High office, is like a pyramid; only two kinds of animals reach the summit — reptiles and eagles.

There are only two kinds of certain knowledge: Awareness of our own existence and the truths of mathematics.

The more wit we have, the less satisfied we are with it.

The true system of the World has been recognized, developed and perfected...Everything has been discussed and analysed, or at least mentioned.

To someone who could grasp the Universe from a unified standpoint the entire creation would appear as a unique truth and necessity.

A philosopher is a fool who torments himself while he is alive, to be talked of after he is dead.

Algebra is generous; she often gives more than is asked of her.