If you are actually devotee, then God will reveal. That is . . . that is stated in the Vedic language, ataḥ śrī-kṛṣṇa-nāmādi na bhaved grāhyam indriyaiḥ (Brs. 1.2.234): "You cannot understand the form, name, attributes, pastimes of God by these blunt senses." These senses, present ten senses, cannot realize. Ataḥ śrī-kṛṣṇa-nāmādi na bhaved grāhyam indriyaiḥ. Indriya means sense. Then how to realize? Sevonmukhe hi jihvādau. When you begin service with your tongue, then gradually God reveals. So tongue means you can do two business with the tongue: one is talking and one is eating. So if you engage your tongue in glorifying God, and if you eat God's prasāda, then you realize God. Therefore these young boys and girls from Europe and America, they have been . . . they are being taught, "Use the tongue for Kṛṣṇa. Chant Hare Kṛṣṇa and eat Kṛṣṇa prasāda."
And as practical result, although they are very young, still, they have realized God, Kṛṣṇa, far advanced than anyone else. They have forgotten all material things: illicit sex, meat-eating, intoxication, gambling. They are simply devoted in the service of Kṛṣṇa. So because they have engaged their tongue in chanting Hare Kṛṣṇa mantra, they have forgotten all kinds of intoxication, meat-eating. The American government spent millions of dollar to stop their LSD habit. They could not stop even one man. But as soon as they come to Kṛṣṇa conscious, they immediately give up.