Reason is the test of ridicule, not ridicule the test of truth.

Enthusiasm is that temper of the mind in which the imagination has got the better of the judgment.

The Egyptians, by the concurrent testimony of antiquity, were among the first who taught that the soul was immortal.

High birth is a thing which I never knew any one to disparage except those who had it not; and I never knew any one to make a boast of it who had anything else to be proud of.

The skilful disputant well knows that he never has his enemy at more advantage than when, by allowing the premises, he shows him arguing wrong from his own principles.

Admiration is one of the most bewitching, enthusiastic passions of the mind; and every common moralist knows that it arises from novelty and surprise, the inseparable attendants of imposture.

Orthodoxy is my doxy - heterodoxy is another man's doxy.