Ambition is the immoderate desire for honor.

Anyone who seeks for the true causes of miracles, and strives to understand natural phenomena as an intelligent being, and not to gaze at them like a fool, is set down and denounced as an impious heretic.

There is no fear without some hope, and no hope without some fear.

I do not know how to teach philosophy without becoming a disturber of established religion.

A man is as much affected pleasurably or painfully by the image of a thing past or future as by the image of a thing present.

...The body is affected by the image of the thing, in the same way as if the thing were actually present.

I make this chief distinction between religion and superstition, that the latter is founded on ignorance, the former on knowledge.