Our process is very simple. Simply engage your tongue. Leave aside all other senses. The tongue is very strong. And tongue is our bitterest enemy, and tongue can be your most intimate friend, this tongue. Therefore the sastra says that sevonmukhe hi jihvadau: just engage your tongue in the service of the Lord, and He will be revealed. Very nice. Now what we do with the tongue?

We talk: talk of Krsna. We sing: chant of Krsna. We eat: taste, eat Krsna prasada. You will understand Krsna. Any foolish person, any uneducated or any position of life, you can use your tongue for Krsna's service. Don't eat anything which is not eaten by Krsna — your tongue becomes your most intimate friend. And don't talk anything except Krsna. If you follow these two principles, Krsna will be within your grip.

From Srila Prabhupada's lecture on Srimad-Bhagavatam 1.14.44 — April 8, 1973, New York