The wicked can have only accomplices, the voluptuous have companions in debauchery, self-seekers have associates, the politic assemble the factions, the typical idler has connections, princes have courtiers. Only the virtuous have friends.
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.
It is an infantile superstition of the human spirit that virginity would be thought a virtue and not the barrier that separates ignorance from knowledge.