Reason and experience both forbid us to expect that national morality can prevail in exclusion of religious principle.

The various modes of religion which prevailed in the Roman world were all considered by the people as equally true, by the philosophers equally false, and by the magistrate as equally useful.

Whatsoever is, is in God.

I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use.

Talk to me about the truth of religion and I’ll listen gladly. Talk to me about the duty of religion and I’ll listen submissively. But don’t come talking to me about the consolations of religion or I shall suspect that you don’t understand.

If God did not exist, it would be necessary to invent him.

God is a concept by which we measure our pain.

The freedom or immunity from coercion in matters religious, which is the endowment of persons as individuals, is also to be recognized as their right when they act in community. Religious communities are a requirement of the social nature both of man and of religion itself.

The wrath of the lion is the wisdom of God.

The nature of God is a circle, of which the center is everywhere and the circumference is nowhere.

To doubt everything or to believe everything are two equally convenient solutions; both dispense with the need for thought.

Among all nations, through the darkest polytheism glimmer some faint sparks of monotheism.

To place oneself in the position of God is painful: being God is equivalent to being tortured. For being God means that one is in harmony with all that is, including the worst. The existence of the worst evils is unimaginable unless God willed them.