Devotee (5): Śrīla Prabhupāda, you were saying that only if one can understand the nature of God, then he can go back home.
Prabhupāda: Yes.
Devotee (5): But we have the case of the four Kumaras who were wandering in the Vaikuṇṭha planets, and yet they had not become fully God-realized at that point, and yet they were allowed to enter...
Prabhupāda: Those who are going to Vaikuṇṭha planets, they are not fully realized of God? What does he say?
Madhudvīṣa: He was citing the instance of the four Kumaras who were traveling through the gates of the Vaikuṇṭha world, but actually they were not completely God-realized...
Prabhupāda: Therefore they are on the gates of Vaikuṇṭha, not within. You cannot enter the kingdom of God without full understanding. So you have to be trained up. This is the life. You become trained up to understand God, and you will enter the kingdom of God.