SB 5.26.39
srutva sthulam tatha suksmam
rupam bhagavato yatih
sthule nirjitam atmanam
sanaih suksmam dhiya nayed iti
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
One who is interested in liberation, who accepts the path of liberation and is not attracted to the path of conditional life, is called yati, or a devotee. Such a person should first control his mind by thinking of the virat-rupa, the gigantic universal form of the Lord, and then gradually think of the spiritual form of Krsna [sac-cid-ananda-vigraha] after hearing of both forms. Thus one’s mind is fixed in samadhi. By devotional service one can then realize the spiritual form of the Lord, which is the destination of devotees. Thus his life becomes successful.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
It is said, mahat-sevam dvaram ahur vimukteh: if one wants to progress on the path of liberation, he should associate with mahatmas, or liberated devotees, because in such association there is a full chance for hearing, describing and chanting about the name, form, qualities and paraphernalia of the Supreme Personality of Godhead, all of which are described in Srimad-Bhagavatam. On the path of bondage, one eternally undergoes the repetition of birth and death. One who desires liberation from such bondage should join the International Society for Krishna Consciousness and thus take advantage of the opportunity to hear Srimad-Bhagavatam from devotees and also explain it to propagate Krsna consciousness.