I don't understand how, up to now, an atheist could know there is no God and not...

I don't understand how, up to now, an atheist could know there is no God and not kill himself at once. To recognize that there is no God, and not to recognize at the same time that you have become God, is an absurdity, otherwise you must necessarily kill yourself. Once you recognize it, you are king, and you will not kill yourself but will live in the chiefest glory. But one, the one who is first, must necessarily kill himself, otherwise who will begin and prove it? It is I who will necessarily kill myself in order to begin and prove it. I am still God against my will, and I am unhappy, because it is my duty to proclaim self-will. Everyone is unhappy, because everyone is afraid to proclaim self-will. That is why man has been so unhappy and poor up to now, because he was afraid to proclaim the chief point of self-will and was self-willed only on the margins, like a schoolboy. I am terribly unhappy, because I am terribly afraid. Fear is man's curse … But I will proclaim self-will, it is my duty to believe that I do not believe. I will begin, and end, and open the door. And save. Only this one thing will save all men and in the next generation transform them physically; for in the present physical aspect, so far as I have thought, it is in no way possible for man to be without the former God. For three years I have been searching for the attribute of my divinity, and I have found it: the attribute of my divinity is-Self-will! That is all, by which I can show in the main point my insubordination and my new fearsome freedom. For it is very fearsome. I kill myself to show my insubordination and my new fearsome freedom."
Dostoevsky, Fyodor {2010-05-06}. Demons {Vintage Classics} {p. 619}. Random House, Inc.. Kindle Edition.