God cannot be denied; only purified senses through bhakti reveal the Supreme.Listen — Srila Prabhupada Uvaca
Prabhupāda: avajānanti māṃ mūòhā mānuṣīṃ tanum āśritam paraṃ bhāvam ajānanto mama bhūta-maheśvaram [Bg 9.11] [Fools deride Me when I descend in the human form. They do not know My transcendental nature and My supreme dominion over all that be.] So Lord Kṛṣṇa says that the mūòha... Mūòha means the foolish, just like animal or less than animal. An ass, he is called mūòha.
So avajānanti. Avajānanti means deride, "deride at Me." That any person who does not believe in God, he must be either a madman or foolish man number one. Any person who does not believe in God. There is no reason that we cannot believe in God.
There is every reason. So suppose if you are saying that "I don't believe in God," but who has given you this power to say that "I don't believe in God"? You are speaking, "I don't believe in God," but as soon as there is something, you cannot speak, everything stopped. So who has given you this speaking power that you dare to say that "I don't believe in God"?
Will you not think that "How I am speaking? Who has given me this power?" Do you mean to say that this speaking power has come automatically from the stone? This body is just like as good as stone. As soon as the speaking power is withdrawn by the supreme authority, you are as good as stone, this body.
What is the meaning of this body? So who has given you the speaking power that you are denying, that "I don't believe in God"? Therefore an atheist or an unbeliever, he must be a first-class foolish man. There is no other reason that one can deny the existence of God. It is very simple reasoning, that who has given you the power to talk and who, if he withdraws the power from you, then what is your value?
How can you boastly say that "I don't believe in God"? This very power of speaking is the proof that there is the greatest authority who gives you everything. Therefore the Kṛṣṇa conscious person, he knows that "Everything, whatever I have got, it is not my..., under my control. The controller is different. I am feeling...
I am simply using it. I am talking. This is my hand; I am working. But if the power of working is immediately withdrawn—it is paralyzed—have you got any power to revive this working power of this hand?