Weakness, fear, melancholy, together with ignorance, are the true sources of superstition. Hope, pride, presumption, a warm indignation, together with ignorance, are the true sources of enthusiasm.

Anything that is conceivable is possible.

Almost every one has a predominant inclination, to which his other desires and affections submit, and which governs him, though perhaps with some intervals, though the whole course of his life.

Human happiness seems to consist in three ingredients; action, pleasure and indolence. And though these ingredients ought to be mixed in different proportions, according to the disposition of the person, yet no one ingredient can be entirely wanting without destroying in some measure the relish of the whole composition.

Let us become thoroughly sensible of the weakness, blindness, and narrow limits of human reason: Let us duly consider its uncertainty and endless contrarieties, even in subjects of common life and practice.... When these topics are displayed in their full light, as they are by some philosophers and almost all divines; who can retain such confidence in this frail faculty of reason as to pay any regard to its determinations in points so sublime, so abstruse, so remote from common life and experience?

Liberty of any kind is never lost all at once.

No truth appears to me more evident than that beasts are endowed with thought and reason as well as men.