Bhagavad Gita 2.46

yāvān artha udapāne
sarvataḥ samplutodake
tāvān sarveṣu vedeṣu
brāhmaṇasya vijānataḥ

Translation of Bhagavad Gita 2.46

All purposes served by a small well can at once be served by a great reservoir of water. Similarly, all the purposes of the Vedas can be served to one who knows the purpose behind them.

Commentary by Sri A.C. Bhaktivedanta Swami Prabhupada of Gaudiya Sampradaya:

The rituals and sacrifices mentioned in the karma-kanda division of the Vedic literature are meant to encourage gradual development of self-realization. And the purpose of self-realization is clearly stated in the Fifteenth Chapter of the Bhagavad-gita (15.15): the purpose of studying the Vedas is to know Lord Krishna, the primeval cause of everything. So, self-realization means understanding Krishna and one’s eternal relationship with Him. The relationship of the living entities with Krishna is also mentioned in the Fifteenth Chapter of Bhagavad-gita (15.7). The living entities are parts and parcels of Krishna; therefore, revival of Krishna consciousness by the individual living entity is the highest perfectional stage of Vedic knowledge. This is confirmed in the Srimad-Bhagavatam (3.33.7) as follows:

aho bata sva-paco ’to gariyan
yaj-jihvagre vartate nama tubhyam
tepus tapas te juhuvuh sasnur arya
brahmanucur nama grnanti ye te

“O my Lord, a person who is chanting Your holy name, although born of a low family like that of a candala [dog-eater], is situated on the highest platform of self-realization. Such a person must have performed all kinds of penances and sacrifices according to Vedic rituals and studied the Vedic literatures many, many times after taking his bath in all the holy places of pilgrimage. Such a person is considered to be the best of the Aryan family.

So one must be intelligent enough to understand the purpose of the Vedas, without being attached to the rituals only, and must not desire to be elevated to the heavenly kingdoms for a better quality of sense gratification. It is not possible for the common man in this age to follow all the rules and regulations of the Vedic rituals, nor is it possible to study all of the Vedanta and the Upanishads thoroughly. It requires much time, energy, knowledge and resources to execute the purposes of the Vedas. This is hardly possible in this age. The best purpose of Vedic culture is served, however, by chanting the holy name of the Lord, as recommended by Lord Caitanya, the deliverer of all fallen souls. When Lord Caitanya was asked by a great Vedic scholar, Prakasananda Sarasvati, why He, the Lord, was chanting the holy name of the Lord like a sentimentalist instead of studying Vedanta philosophy, the Lord replied that His spiritual master had found Him to be a great fool and thus asked Him to chant the holy name of Lord Krishna. He did so, and became ecstatic like a madman. In this Age of Kali, most of the population is foolish and not adequately educated to understand Vedanta philosophy; the best purpose of Vedanta philosophy is served by inoffensively chanting the holy name of the Lord. Vedanta is the last word in Vedic wisdom, and the author and knower of the Vedanta philosophy is Lord Krishna; and the highest Vedantist is the great soul who takes pleasure in chanting the holy name of the Lord. That is the ultimate purpose of all Vedic mysticism.

Commentary by Sri Vishvanatha Chakravarthi Thakur of Gaudiya Sampradaya:

The glory of bhakti yoga, being niskama and nirguna, is such that it goes without saying that it is without loss or sin, even if started and discontinued. That even a little performance of bhakti makes one successful is stated by Uddhava in the Eleventh Canto.

na hy angopakrame dhvamso mad-dharmasyoddhavanv api maya vyavasitah samyan nirgunatvad anasisah

My dear Uddhava, because I have personally established it, this process of devotional service unto Me is transcendental and free from any material motivation. Certainly a devotee never suffers even the slightest loss by adopting this process. SB 11.29.20

However, even bhakti with material desire (sakama bhakti) is known by the term vyavasayatmika buddhi (since there is worship of only one person). This is shown through an example.

The singular case is used to indicate a whole class of wells. “Whatever purposes the wells serve” is the meaning of yavan artha udapane. Some wells are used for cleaning the body after passing nature. Some others are used for brushing teeth. Others are used for washing clothing. Others are used for washing hair. Others are used for bathing. Others are used for drinking water.

All the purposes of all the different wells are served by a large body of water like a lake. In that one lake, one can perform all the activities such as cleaning the body. And by using different wells for different purposes, one becomes tired of wandering around. That is not the case in using the lake. The outstanding quality of the lake water however is its sweet taste, whereas that of the well is not tasty.

Thus, whatever purposes are served by worship of all the devatas mentioned in all the Vedas are achieved by worship of the one Supreme Lord, by the person in knowledge, one who knows the Vedas (brahmanasya). He who knows the Veda, brahtna, is called brahmana. One who knows the Vedas knows the import of the Vedas, bhakti.

As it says in the Second Canto of Bhagavatam:

brahma-varcasa-kamas tu yajeta brahmanah patim indram indriya-kamas tu praja-kamah prajapatim

One who desires to be absorbed in the impersonal brahmajyoti effulgence should worship the master of the Vedas, one who desires powerful sex should worship the heavenly King, Indra, and one who desires good progeny should worship the great progenitors called the Prajapatis. SB 2.3.3

But then it is said:

akamah sarva-kamo va moksa-kama udara-dhih tivrena bhakti-yogena yajeta purusam param

A person who has broader intelligence, whether he be full of all material desire, without any material desire, or desiring liberation, must by all means worship the supreme whole, the Personality of Godhead. SB 2.3.10

Just as the sunshine, unmixed with clouds or other obstructions, is intense, bhakti yoga, unmixed with jnana, karma or other Pollutants,   is  intense   (tivrena  bhakti  yogena). One attains fulfillment of many desires by worshipping many devatas. This requires many types of mental concentration. But one can attain all those desires from the one Supreme Lord, from just one portion of the ones concentration on the one Lord. One should understand that this concentration on one personality (and attaining many goals) arises from the spiritual nature of the object of concentration.

Commentary by Sri Ramanuja of Sri Sampradaya:

2.46 If there be no need for the infinite results of all the rites and duties mentioned in the Vedas, then why should they be performed as a dedication to God? Listen to the answer being given: In the world, yavan, whatever; arthah, utility, use, like bathing, drinking, etc.; one has udapane, in a well, pond and other numerous limited reservoirs; all that, indeed, is achieved, i.e. all those needs are fulfilled to that very extent; sampluhtodake, when there is a flood; sarvatah, all arount. In a similar manner, whatever utility, result of action, there is sarvesu, in all; the vedesu, Vedas, i.e. in the rites and duties mentioned in the Vedas; all that utility is achieved, i.e. gets fulfilled; tavan, to that very extent; in that result of realization which comes brahmanasya, to a Brahmana, a sannyasin; vijanatah, who knows the Reality that is the supreme Goal — that result being comparable to the flood all around. For there is the Upanisadic text, ‘…so all virtuous deeds performed by people get included in this one…who knows what he (Raikva) knows…’ (Ch. 4.1.4). The Lord also will say, ‘all actions in their totality culminate in Knowledge’ (4.33). [The Commentators quotation from the Ch. relates to meditation on the qualified Brahman. Lest it be concluded that the present verse relates to knowledge of the qualified Brahman only, he quotes again from the Gita toshow that the conclusion holds good in the case of knowledge of the absolute Brahman as well.] Therefore, before one attains the fitness for steadfastness in Knowledge, rites and duties, even though they have (limited) utility as that of a well, pond, etc., have to be undertaken by one who is fit for rites and duties.

Commentary by Sri Sridhara Swami of Rudra Sampradaya:

It may be questioned that fixed determination which seeks service of the Supreme Lord in a disinterested way by renouncing the various fruits described in revealed scriptures is indeed a contradictory resolve. To answer this the Supreme Lord speaks this verse. As a small pot of water all the needs of a person drinking and bathing cannot be satisfied at one place; but all these purposes can be satisfied in a great reservoir of water. Similarly a person who has realised the nature of the Ultimate Truth verily has indeed all the results of all the various prescribed rituals prescribed throughout the Vedic scriptures; for the bliss of the Ultimate Truth contains all finite joys. As is confirmed in the Brihad- aranyaka Upanisad 4.3.32 states: On a fraction of the basis of the Ultimate truth do all living entities exist. Therefore the fixed determination of surrendering in righteousness all ones actions unto the Supreme Lord alone is the correct resolve.

Commentary by Sri Madhvacharya of Brahma Sampradaya:

Therefore the rewards available to those who act with spiritual intelligence are not accessible to those who are seekers of fruitive desires. But even still there is some similarity, therefore Lord Krishna states in this verse that all the purposes which can be served by a well of water are easily served by a large reservoir of water as well. So similarly whatever rewards are given in the Vedic scriptures are easily available to one established in spiritual intelligence of brahman or the Ultimate Truth because in such a state of consciousness all benefits are inclusive. Therefore one who knows the science of brahman is known as a brahmana. The word vijanatah meaning one who is complete in knowledge receives the reward of knowing the Ultimate Truth.

Now begins the summation.

Being the source of all creation without the assistance of anything else, complete in all attributes, the Supreme Lord Krishna is known as the reservoir or shelter of all. Reservoir can also mean body of water and at the time of universal dissolution the Supreme Lord assumes the very nature of water on all sides enveloping all.

Whatever benefit is there by the Supreme Lord being pleased with an aspirant, the same benefit is available to one who is knowledgeable of the Vedic scriptures; yet all the meanings of the Vedic scriptures have been understood by one who has realised devotion to the Supreme Lord Krishna. By such enlightened understanding, the Supreme Lord, who is the Ultimate dispenser of all rewards becomes pleased.

During the course of universal dissolution whatever rewards are ordained by the Supreme Lord Krishna, who is full of all attributes, independent from any support and transcendental to time; the same fruits are available for one who has knowledge of the confidential meanings in the Vedic scriptures.

At the time of universal dissolution nothing else exists in the material worlds excepting the Supreme Lord. Those who by dint of their spiritual intelligence who have become self-realised and have discovered their soul will not be without shelter being under the complete protection of the Supreme Lord. These delivered souls will not be subject to the vagaries of time but insulated by the transcendental energy of the Supreme Lord will be delivered to the spiritual worlds.

Without the essential assistance of His primal breath which is indispensable and is originating from His inherent impulse that alone existed when nothing else other than Him existed. Darkness was enveloped by darkness and in the beginning all was enveloped by water on all sides enveloping all.

In the beginning of creation water alone existed itself solely as impulse and within this impulse generated by the Supreme Lord Himself, the Supreme Lord reclined in all His undivided oneness as revealed in the Vedic scriptures.

Commentary by Sri Keshava Kashmiri of Kumara Sampradaya:

Now the three modes that were dealt with in the Vedas has been set aside for there is not a single thing within the material existence that is apart from the three modes. So in lieu of this one may question that in seeking liberation from material existence one would have to abandon everything, even that which is required for the performance of worship and thus there would be no motivation. To this Lord Krishna instructs this verse that just as different wells for drinking, bathing, washing animals etc. can be used all their uses can be satisfied by a large reservoir of water. Thinking in this way one desiring liberation who is enlightened by the reality of the Vedas realises and follows the conclusion of the Vedas. One should follow that portion of the Vedas to perform activities that are most pleasing to Lord Krishna which is in the best interests of all beings. It is not that one must just adopt everything that is said in the Vedas. One should never do activities against the injunctions of the Vedic scriptures but according to qualification and circumstances one must follow what is prescribed in the Vedas. For example certain rituals such as the agnihotra are prescribed to be performed in the Vedas; but they are prescribed for married householders. They are not to be performed by sannyasis. Also celibacy is prescribed in the Vedic scriptures but it is prescribed for brahmacaris and sannyasis. It is not prescribed for married householders. So it is not that everything in the Vedas is to be followed by everyone although all the four orders must certainly follow the Vedas but according to ones ashram. This is the discrimination regarding this matter.

Commentary by Sri Adi Shankaracharya of Advaita Sampradaya:

2.46 If there be no need for the infinite results of all the rites and duties mentioned in the Vedas, then why should they be performed as a dedication to God? Listen to the answer being given: In the world, yavan, whatever; arthah, utility, use, like bathing, drinking, etc.; one has udapane, in a well, pond and other numerous limited reservoirs; all that, indeed, is achieved, i.e. all those needs are fulfilled to that very extent; sampluhtodake, when there is a flood; sarvatah, all arount. In a similar manner, whatever utility, result of action, there is sarvesu, in all; the vedesu, Vedas, i.e. in the rites and duties mentioned in the Vedas; all that utility is achieved, i.e. gets fulfilled; tavan, to that very extent; in that result of realization which comes brahmanasya, to a Brahmana, a sannyasin; vijanatah, who knows the Reality that is the supreme Goal — that result being comparable to the flood all around. For there is the Upanisadic text, ‘…so all virtuous deeds performed by people get included in this one…who knows what he (Raikva) knows…’ (Ch. 4.1.4). The Lord also will say, ‘all actions in their totality culminate in Knowledge’ (4.33). [The Commentators quotation from the Ch. relates to meditation on the qualified Brahman. Lest it be concluded that the present verse relates to knowledge of the qualified Brahman only, he quotes again from the Gita toshow that the conclusion holds good in the case of knowledge of the absolute Brahman as well.] Therefore, before one attains the fitness for steadfastness in Knowledge, rites and duties, even though they have (limited) utility as that of a well, pond, etc., have to be undertaken by one who is fit for rites and duties.

Commentary by Sri Abhinavagupta of Kaula Tantra Sampradaya:

2.46 Yavan etc. He, according to whom the importance lies in his own duty alone or in the knowledge – for him the purpose is served even from a limited portion of the Vedic teaching Therefore-

Sanskrit Shloka Without Transliteration Marks:

yavan artha udapane
sarvatah samplutodake
tavan sarvesu vedesu
brahmanasya vijanatah

Sanskrit to English Word for Word Meanings:

yāvān — all that; arthaḥ — is meant; uda-pāne — in a well of water; sarvataḥ — in all respects; sampluta-udake — in a great reservoir of water; tāvān — similarly; sarveṣu — in all; vedeṣu — Vedic literatures; brāhmaṇasya — of the man who knows the Supreme Brahman; vijānataḥ — who is in complete knowledge.