To excite in us tastes, odors, and sounds I believe that nothing is required in external bodies except shapes, numbers, and slow or rapid movements. ... if ears, tongues, and noses were removed, shapes and numbers and motions would remain, but not odors or tastes or sounds.

See now the power of truth.

They seemed to forget that the increase of known truths stimulates the investigation, establishment and growth of the arts; not their dimination or destruction.

To understand the Universe, you must understand the language in which it's written, the language of Mathematics.

Nature...does not act by means of many things when it can do so by means of a few.

The greatest wisdom is to get to know oneself.

In the sciences, the authority of thousands of opinions is not worth as much as one tiny spark of reason in an individual man.