Bob: When I pray faithfully and reverently, does Kṛṣṇa hear me?
Prabhupāda: Yes.
Bob: Directly?
Prabhupāda: Yes.
Bob: From me to Him?
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).