Revatīnandana: In the Bhāgavatam and also in the Teachings of Lord Caitanya you talk about the oṁkāra and tat tvam asi vibration. Now, the impersonalists improperly emphasize tat tvam asi over the original oṁkāra. I was wondering what are the significance of these two vibrations and what is their relationship to Kṛṣṇa? What is tat tvam asi?
Prabhupāda: Oṁkāra is Kṛṣṇa also. Kṛṣṇa is everything. Why not oṁkāra? So tat tvam asi means "You are the same." Tat tvam asi. That means you are spirit soul. So what is the objection? And for every Vedic mantra, the oṁkāra is there. Praṇāma. Every Vedic mantra. Just like we also chant oṁ tad viṣṇoḥ paramam. Oṁ bhūr bhuvaḥ svaḥ tat savitur vareṇyam. So every Vedic mantra is preceded by the oṁkāra.