Devotee: Śrīla Prabhupāda, how can one remain humble?
Devotee: How can one remain humble in executing his devotional service?
Prabhupāda: Yes. If he thinks himself that "I am non-entity, helpless," then he can remain. If he thinks "I can do something. I have got so much intelligence," then he cannot become humble. Just like child is humble always because he knows that "I am completely helpless. Unless mother helps me, I am complete..." Therefore, whenever he's in need of something, he cries, "Mother, help me." This is helplessness. Helplessness. Always. Kārpaṇye. This is one of the items of surrender. Unless you think yourself helpless, you cannot surrender. Surrender is complete when you think yourself that you are helpless. "I am helpless, but because I am surrendered to Kṛṣṇa, He'll save me." This faith also must be there, that "Although I am helpless... Not although I am factually helpless but because I am surrendered to Kṛṣṇa, I have no danger. He'll help me, protect me."
(Srila Prabhupada Morning Walk, Paris, June 11, 1974)