We know that there is an infinite, and we know not its nature. As we know it to be false that numbers are finite, it is therefore true that there is a numerical infinity. But we know not of what kind; it is untrue that it is even, untrue that it is odd; for the addition of a unit does not change its nature; yet it is a number, and every number is odd or even (this certainly holds of every finite number). Thus we may quite well know that there is a God without knowing what He is.

If you want to be a real seeker of truth, you need to, at least once in your lifetime, doubt in, as much as it's possible, in everything.

The least movement is of importance to all nature. The entire ocean is affected by a pebble.

Thought makes the whole dignity of man; therefore endeavor to think well, that is the only morality.

There are only two kinds of men: the righteous who think they are sinners and the sinners who think they are righteous.

Reason commands us far more imperiously than a master; for in disobeying the one we are unfortunate, and in disobeying the other we are fools.

All I know is that I must soon die, but what I know least is this very death which I cannot escape.