The greatest pride, or the greatest despondency, is the greatest ignorance of one's self.

Fear cannot be without hope nor hope without fear.

None are more taken in by flattery than the proud, who wish to be the first and are not.

Except God no substance can be granted or conceived. .. Everything, I say, is in God, and all things which are made, are made by the laws of the infinite nature of God, and necessarily follows from the necessity of his essence.

If facts conflict with a theory, either the theory must be changed or the facts.

I would warn you that I do not attribute to nature either beauty or deformity, order or confusion. Only in relation to our imagination can things be called beautiful or ugly, well-ordered or confused.