Srimad Bhagavatam Canto 04, Chapter 31, Text 02

SB 4.31.2

diksita brahma-satrena
praticyam disi velayam
 siddho ’bhud yatra jajalih
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
The Pracetas went to the seashore in the west where the great liberated sage Jajali was residing. After perfecting the spiritual knowledge by which one becomes equal toward all living entities, the Pracetas became perfect in Krsna consciousness.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
The word brahma-satra means “cultivation of spiritual knowledge.” Actually, both the Vedas and severe austerity are known as brahma (vedas tattvam tapo brahma). Brahma also means “the Absolute Truth.” One has to cultivate knowledge of the Absolute Truth by pursuing studies in the Vedas and undergoing severe austerities and penances. The Pracetas properly executed this function and consequently became equal to all other living entities. As Bhagavad-gita (18.54) confirms:
brahma-bhutah prasannatma
 na socati na kanksati
samah sarvesu bhutesu
 mad-bhaktim labhate param
“One who is thus transcendentally situated at once realizes the Supreme Brahman and becomes fully joyful. He never laments or desires to have anything; he is equally disposed to every living entity. In that state he attains pure devotional service unto Me.”
When one actually becomes spiritually advanced, he does not see the difference between one living entity and another. This platform is attained by determination. When perfect knowledge is expanded, one ceases to see the outward covering of the living entity. He sees, rather, the spirit soul within the body. Thus he does not make distinctions between a human being and an animal, a learned brahmana and a candala:
 brahmane gavi hastini
suni caiva svapake ca
 panditah sama-darsinah
“The humble sage, by virtue of true knowledge, sees with equal vision a learned and gentle brahmana, a cow, an elephant, a dog and a dog-eater [outcaste].” (Bg. 5.18)
A learned person sees everyone equally on a spiritual basis, and a learned person, a devotee, wants to see everyone developed in Krsna consciousness. The place where the Pracetas were residing was perfect for executing spiritual activities, for it is indicated that the great sage Jajali attained mukti (liberation) there. One desiring perfection or liberation should associate with a person who is already liberated. This is called sadhu-sanga, associating with a perfect devotee.
Srimad Bhagavatam Canto 04, Chapter 31, Text 01
Srimad Bhagavatam Canto 04, Chapter 31, Text 03