Srimad Bhagavatam Canto 01, Chapter 18, Text 23

SB 1.18.23

aham hi prsto ’ryamano bhavadbhir
acaksa atmavagamo ’tra yavan
nabhah patanty atma-samam patattrinas
tatha samam visnu-gatim vipascitah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
O rsis, who are as powerfully pure as the sun, I shall try to describe to you the transcendental pastimes of Visnu as far as my knowledge is concerned. As the birds fly in the sky as far as their capacity allows, so do the learned devotees describe the Lord as far as their realization allows.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
 The Supreme Absolute Truth is unlimited. No living being can know about the unlimited by his limited capacity. The Lord is impersonal, personal and localized. By His impersonal feature He is all-pervading Brahman, by His localized feature He is present in everyone’s heart as the Supreme Soul, and by His ultimate personal feature He is the object of transcendental loving service by His fortunate associates the pure devotees. The pastimes of the Lord in different features can only be estimated partly by the great learned devotees. So Srila Suta Gosvami has rightly taken this position in describing the pastimes of the Lord as far as he has realized. Factually only the Lord Himself can describe Himself, and His learned devotee also can describe Him as far as the Lord gives him the power of description.
 
Srimad Bhagavatam Canto 01, Chapter 18, Text 22
Srimad Bhagavatam Canto 01, Chapter 18, Text 24-25