But there must be some pleasure in condemning everything--in perceiving faults where others think they see beauties.' 'You mean there is pleasure in having no pleasure.

Present opportunities are not to be neglected; they rarely visit us twice.

Descartes constructed as noble a road of science, from the point at which he found geometry to that to which he carried it, as Newton himself did after him. ... He carried this spirit of geometry and invention into optics, which under him became a completely new art.

The Pope is an idol whose hands are tied and whose feet are kissed.

Fear follows crime and is its punishment.

The instinct of a man is to pursue everything that flies from him, and to fly from all that pursue him.

The more you know, the less sure you are.