Of all religions, the Christian should of course inspire the most tolerance, but until now Christians have been the most intolerant of all men.

It is better to risk saving a guilty man than to condemn an innocent one.

We never live; we are always in the expectation of living.

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

One always begins with the simple, then comes the complex, and by superior enlightenment one often reverts in the end to the simple. Such is the course of human intelligence.

There are barbarians who seize this dog, who so prodigiously surpasses man in friendship, and nail him down to a table, and dissect him alive to show you the mezaraic veins... Answer me, Machinist, has Nature really arranged all the springs of feeling in this animal to the end that he might not feel? Has he nerves that he may be incapable of suffering?

He who cannot shine by thought, seeks to bring himself into notice by a witticism.