ES/731113 Conferencia - Srila Prabhupada Habla Una Gota de Nectar en Delhi
The idea is that Kṛṣṇa, the Supreme Personality of Godhead, when He comes upon this material world just like ordinary human child, He accepts His devotee as His father, His devotee as His mother. That is the way. Therefore Kṛṣṇa appeared as the son of Vasudeva, and He is well known as Vāsudeva.