It does not require great art, or magnificently trained eloquence, to prove that Christians should tolerate each other. I, however, am going further: I say that we should regard all men as our brothers. What? The Turk my brother? The Chinaman my brother? The Jew? The Siam? Yes, without doubt; are we not all children of the same father and creatures of the same God?
We are intelligent beings: intelligent beings cannot have been formed by a crude, blind, insensible being: there is certainly some difference between the ideas of Newton and the dung of a mule. Newton's intelligence, therefore, came from another intelligence
It is with books as with the fires of our grates, everybody borrows a light from his neighbor to kindle his own, which in turn is communicated to others, and each partakes of all.
It requires twenty years for a man to rise from the vegetable state in which he is within his mother's womb, and from the pure animal state which is the lot of his early childhood, to the state when the maturity of reason begins to appear. It has required thirty centuries to learn a little about his structure. It would need eternity to learn something about his soul. It takes an instant to kill him.
What can you say to a man who tells you he prefers obeying God rather than men, and that as a result he's certain he'll go to heaven if he cuts your throat?
What then do you call your soul? What idea have you of it? You cannot of yourselves, without revelation, admit the existence within you of anything but a power unknown to you of feeling and thinking.
I should like to know which is worse: to be ravished a hundred times by pirates, and have a buttock cut off, and run the gauntlet of the Bulgarians, and be flogged and hanged in an auto-da-fe, and be dissected, and have to row in a galley -- in short, to undergo all the miseries we have each of us suffered -- or simply to sit here and do nothing?' That is a hard question,' said Candide.
The institution of religion exists only to keep mankind in order, and to make men merit the goodness of God by their virtue. Everything in a religion which does not tend towards this goal must be considered foreign or dangerous.
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.