Srimad Bhagavatam Canto 11, Chapter 19, Text 04

SB 11.19.4

tapas tirtham japo danam
 pavitranitarani ca
nalam kurvanti tam siddhim
 ya jñana-kalaya krta
 
Translation: 
 
That perfection which is produced by a small fraction of spiritual knowledge cannot be duplicated by performing austerities, visiting holy places, chanting silent prayers, giving in charity or engaging in other pious activities.
 
Purport: 
 
Jñana here refers to a clear understanding of the Lord’s supreme dominion over all that be, and this realized knowledge is nondifferent from the Supreme Personality of Godhead. That the Lord is supreme is confirmed in the previous verse by the words padam srestham vidur mama. One may perform penances or visit holy places with a proud mentality or material motivation; similarly, one may chant prayers to God, give charity or perform other externally pious activities with many bizarre, hypocritical or even demoniac motivations. Realized knowledge of the supremacy of Lord Krsna, however, is a solid connection with the spiritual world, and if one pursues this holy understanding one is gradually promoted to the highest level of conscious existence, called Vaikuntha, or the kingdom of God.
Srimad Bhagavatam Canto 11, Chapter 19, Text 03
Srimad Bhagavatam Canto 11, Chapter 19, Text 05