This vāsudeva realization is possible by the impersonalists after many, many births. Not very easily.
- bahūnāṁ janmanām ante
- jñānavān māṁ prapadyate
- vāsudevaḥ sarvam iti
- sa mahātmā sudurlabhaḥ
- (BG 7.19)
Sudurlabhaḥ, "very rare"; mahātmā, "broad-minded." But one who cannot understand Kṛṣṇa, they are cripple-minded. They are not broad-minded. If one becomes broad-minded, then, by the grace of Kṛṣṇa, he can understand Kṛṣṇa.
Sevonmukhe hi jihvādau (Brs. 1.2.234). The process is sevonmukha, service. Service, beginning with the tongue, vāsudeva realization is possible. The service, the first service is śravaṇaṁ kīrtanam (SB 7.5.23). Chant Hare Kṛṣṇa mantra and hear repeatedly, and take prasāda. These are the two businesses of the tongue. So you'll realize. Very simple method. Sevonmukhe hi jihvādau svayam . . . Kṛṣṇa will reveal. Not that by your endeavor you can understand Kṛṣṇa, but your endeavor in the loving service, that will make you qualified. Kṛṣṇa will reveal. Svayam eva sphuraty adaḥ. Kṛṣṇa is very much anxious to take you back home, back to Godhead. But we are stubborn. We do not wish. So He's always finding out the opportunity how you can be taken back home, back to Godhead.