Those who think are excessively few; and those few do not set themselves to disturb the world.
Every man can educate himself. It's shameful to put one's mind into the hands of those whom you wouldn't entrust with your money. Dare to think for yourself.
The world embarrasses me, and I cannot dream that this watch exists and has no watchmaker.
Faith consists in believing what reason cannot.
It is the flash which appears, the thunderbolt will follow.
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.