The severe schools shall never laugh me out of the philosophy of Hermes, that this visible world is but a picture of the invisible, wherein as in a portrait, things are not truly, but in equivocal shapes, and as they counterfeit some real substance in that invisible fabric.

To make an end of all things on Earth, and our Planetical System of the World, he (God) need but put out the Sun.

No one should approach the temple of science with the soul of a money changer.

Oblivion is not to be hired.

I have tried if I could reach that great resolution . . . to be honest without a thought of Heaven or Hell.

A man may be in as just possession of the truth as of a city, and yet be forced to surrender.

Natura nihil agit frustra [Nature does nothing in vain] is the only indisputible axiom in philosophy. There are no grotesques in nature; not any thing framed to fill up empty cantons, and unncecessary spaces.