Every sensible man, every honorable man, must hold the Christian sect in horror." "Christianity is the most ridiculous, the most absurd and bloody religion that has ever infected the world." "Nothing can be more contrary to religion and the clergy than reason and common sense." "If we believe absurdities, we shall commit atrocities.

All is for the best in the best of all possible worlds.

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.

This agglomeration which was called and which still calls itself the Holy Roman Empire was neither holy, nor Roman, nor an empire.

Translations increase the faults of a work and spoil its beauties.

I also know that we must cultivate our garden. For when man was put in the Garden of Eden, he was put there ut operaretur eum, to work; which proves that man was not born for rest.

Self love is the instrument of our preservation.