SB 7.15.45
yavan nr-kaya-ratham atma-vasopakalpam
dhatte garistha-caranarcanaya nisatam
jñanasim acyuta-balo dadhad asta-satruh
svananda-tusta upasanta idam vijahyat
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
As long as one has to accept a material body, with its different parts and paraphernalia, which are not fully under one’s control, one must have the lotus feet of his superiors, namely his spiritual master and the spiritual master’s predecessors. By their mercy, one can sharpen the sword of knowledge, and with the power of the Supreme Personality of Godhead’s mercy one must then conquer the enemies mentioned above. In this way, the devotee should be able to merge into his own transcendental bliss, and then he may give up his body and resume his spiritual identity.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In Bhagavad-gita (4.9) the Lord says:
janma karma ca me divyam
evam yo vetti tattvatah
tyaktva deham punar janma
naiti mam eti so ’rjuna
“One who knows the transcendental nature of My appearance and activities does not, upon leaving the body, take his birth again in this material world, but attains My eternal abode, O Arjuna.” This is the highest perfection of life, and the human body is meant for this purpose. It is said in Srimad-Bhagavatam (11.20.17):
nr-deham adyam sulabham sudurlabham
plavam sukalpam guru-karnadharam
mayanukulena nabhasvateritam
puman bhavabdhim na taret sa atma-ha
This human form of body is a most valuable boat, and the spiritual master is the captain, guru-karnadharam, to guide the boat in plying across the ocean of nescience. The instruction of Krsna is a favorable breeze. One must use all these facilities to cross over the ocean of nescience. Since the spiritual master is the captain, one must serve the spiritual master very sincerely so that by his mercy one will be able to get the mercy of the Supreme Lord.
A significant word here is acyuta-balah. The spiritual master is certainly very merciful to his disciples, and consequently by satisfying him a devotee gets strength from the Supreme Personality of Godhead. Sri Caitanya Mahaprabhu therefore says, guru-krsna-prasade paya bhakti-lata-bija: one must first please the spiritual master, and then one automatically pleases Krsna and gets the strength with which to cross the ocean of nescience. If one seriously desires to return home, back to Godhead, one must therefore become strong enough by pleasing the spiritual master, for thus one gets the weapon with which to conquer the enemy, and one also gets the grace of Krsna. Simply getting the weapon of jñana is insufficient. One must sharpen the weapon by serving the spiritual master and adhering to his instructions. Then the candidate will get the mercy of the Supreme Personality of Godhead. In general warfare one must take help from his chariot and horses in order to conquer his enemy, and after conquering his enemies he may give up the chariot and its paraphernalia. Similarly, as long as one has a human body, one should fully use it to obtain the highest perfection of life, namely going back home, back to Godhead.
The perfection of knowledge is certainly to become transcendentally situated (brahma-bhuta). As the Lord says in Bhagavad-gita (18.54):
brahma-bhutah prasannatma
na socati na kanksati
samah sarvesu bhutesu
mad-bhaktim labhate param
“One who is transcendentally situated at once realizes the Supreme Brahman and becomes fully joyful. He never laments or desires to have anything; he is equally disposed toward all living entities. In that state he attains pure devotional service.” Simply by cultivating knowledge as the impersonalists do, one cannot get out of the clutches of maya. One must attain the platform of bhakti.
bhaktya mam abhijanati
yavan yas casmi tattvatah
tato mam tattvato jñatva
visate tad-anantaram
“One can understand the Supreme Personality as He is only by devotional service. And when one is in full consciousness of the Supreme Lord by such devotion, he can enter into the kingdom of God.” (Bg. 18.55) Unless one has attained the stage of devotional service and the mercy of the spiritual master and Krsna, there is a possibility that one may fall down and again accept a material body. Therefore Krsna stresses in Bhagavad-gita (4.9):
janma karma ca me divyam
evam yo vetti tattvatah
tyaktva deham punar janma
naiti mam eti so ’rjuna
“One who knows the transcendental nature of My appearance and activities does not, upon leaving the body, take his birth again in this material world, but attains My eternal abode, O Arjuna.”
The word tattvatah, meaning “in reality,” is very important. Tato mam tattvato jñatva. Unless one understands Krsna in truth by the mercy of the spiritual master, one is not free to give up his material body. As it is said, aruhya krcchrena param padam tatah patanty adho ’nadrta-yusmad-anghrayah: if one neglects to serve the lotus feet of Krsna, one cannot become free from the material clutches simply by knowledge. Even if one attains the stage of brahma-padam, merging in Brahman, without bhakti he is prone to fall down. One must be very careful in regard to the danger of falling down again into material bondage. The only insurance is to come to the stage of bhakti, from which one is sure not to fall. Then one is free from the activities of the material world. In summary, as stated by Sri Caitanya Mahaprabhu, one must get in touch with a bona fide spiritual master coming in the parampara of Krsna consciousness, for by his mercy and instructions one is able to get strength from Krsna. Thus one engages in devotional service and attains the ultimate goal of life, the lotus feet of Visnu.
Significant in this verse are the words jñanasim acyuta-balah. Jñanasim, the sword of knowledge, is given by Krsna, and when one serves the guru and Krsna in order to hold the sword of Krsna’s instructions, Balarama gives one strength. Balarama is Nityananda. Vrajendra-nandana yei, saci-suta haila sei, balarama ha-ila nitai. This bala — Balarama — comes with Sri Caitanya Mahaprabhu, and both of Them are so merciful that in this Age of Kali one may very easily take shelter of Their lotus feet. They come especially to deliver the fallen souls of this age. Papi tapi yata chila, hari-name uddharila. Their weapon is sankirtana, hari-nama. Thus one should accept the sword of knowledge from Krsna and be strong with the mercy of Balarama. We are therefore worshiping Krsna-Balarama in Vrndavana. In the Mundaka Upanisad (3.2.4) it is said:
nayam atma bala-hinena labhyo
na ca pramadat tapaso vapy alingat
etair upayair yatate yas tu vidvams
tasyaisa atma visate brahma-dhama
One cannot attain the goal of life without the mercy of Balarama. Sri Narottama dasa Thakura therefore says, nitaiyera karuna habe, vraje radha-krsna pabe: when one receives the mercy of Balarama, Nityananda, one can attain the lotus feet of Radha and Krsna very easily.
se sambandha nahi yara, brtha janma gela tara,
vidya-kule hi karibe tara
If one has no connection with Nitai, Balarama, then even though one is a very learned scholar or jñani or has taken birth in a very respectable family, these assets will not help him. We must therefore conquer the enemies of Krsna consciousness with the strength received from Balarama.