It is a fraud of the Christian system to call the sciences human invention; it is only the application of them that is human.

A long habit of not thinking a thing wrong, gives it a superficial appearance of being right, and raises at first a formidable outcry in defense of custom. But the tumult soon subsides. Time makes more converts than reason.

The mind, in discovering truths, acts in the same manner as it acts through the eye in discovering objects; when once any object has been seen, it is impossible to put the mind back to the same condition it was in before it saw it.

There is something absurd in supposing a continent to be perpetually governed by an island.

Kill the king but spare the man.

You cannot undermine police authority and then complain about rising crime.

One good schoolmaster is of more use than a hundred priests.