Prabhupāda: Because He's within your heart, He's always hearing you. When you are praying or not praying, you are doing some nonsense, He also hearing. And when you pray, that is very good, welcome. But even if you are doing some nonsense, He's hearing.
Bob: Is praying louder than nonsense?
Prabhupāda: Huh?
Bob: To Kṛṣṇa's ear, is praying louder than nonsense talk.
Prabhupāda: No, He's all-perfect. He can hear any temper, or any degree of saying. Even if you don't speak, even if you simply think, He can hear you. As soon as you think that "I shall do it," then He hears you. Sarvasya cāhaṁ hṛdi sanniviṣṭaḥ (BG 15.15).
Bob: But one should pray, is that so? That one should...
Prabhupāda: That is his business.
Bob: Excuse me?
Prabhupāda: That is his business.
Bob: Listening?
Prabhupāda: Praying.
Bob: Whose business? You mean...
Prabhupāda: Every living entity's. That is the only business. Eko bahūnāṁ vidadhāti kāmān. That is the statement of the Vedas.
Bob: What does that mean?
Prabhupāda: He supplies everything. Everyone, actually He's supplying. He's supplying food to everyone. So He's father. So why should you not pray, "Father, give me this"? Just like in Christian Bible there is, "Father, give us our daily bread." That is good, they are accepting the Supreme Father. But grown-up children, they should not ask from the father, but they should be prepared to serve the father. That is bhakti.