What the mysterious is I do not know. I do not call it God because God has come to mean much that I do not believe in. I find myself incapable of thinking of a deity or of any unknown supreme power in anthropomorphic terms, and the fact that many people think so is continually a source of surprise to me. Any idea of a personal God seems very odd to me.

Either God is a Mystery or He is nothing at all.

I don't know what God is, or what God had in mind when the universe was set in motion. In fact, I don't know if God even exists, although I confess that I sometimes find myself praying in times of great fear, or despair, or astonishment at a display of unexpected beauty.

There is no trustworthy evidence as to a god's absolute existence.

He who thinks that God is not comprehended, by him God is comprehended; but he who thinks that God is comprehended knows him not. God is unknown to those who know him, and is known to those who do not know him at all.

There was <a time> when that there was no name for God, and there is going to be when he will not have one.

When I think of the mystery of existence, I prefer to use other words, so as to avoid confusion. And unlike the God of the Islamic State and the Crusades – who cares a lot about names and above all about His most holy name – the mystery of existence doesn’t care an iota what names we apes give it.

Greek faith the due of him who is not known.

God is not the name of God, but an opinion about Him.

Science has only increased the area of the unknown. And if there is a God, her name is Mystery.

I cannot know for certain but I think God is very improbable, and I live my life on the assumption that he is not there.

concerning God, we cannot grasp what he is, but only what he is not, and how other beings stand in relation to him.”18 (206)

God is an essence that we know nothing of. Until this awful blasphemy is got rid of, there never will be any liberal science in the world.

(...) Of what use is your arguing for or against God, when you just do not know who is God, and what are you talking about. (…).