Human Nature is the only science of man; and yet has been hitherto the most neglected.

All sentiment is right; because sentiment has a reference to nothing beyond itself, and is always real, wherever a man is conscious of it. But all determinations of the understanding are not right; because they have a reference to something beyond themselves, to wit, real matter of fact; and are not always conformable to that standard.

To consider the matter aright, reason is nothing but a wonderful and unintelligible instinct in our souls, which carries us along a certain train of ideas, and endows them with particular qualities, according to their particular situations and relations. This instinct, 'tis true, arises from past observation and experience; but can anyone give the ultimate reason, why past experience and observation produces such an effect, any more than why nature alone should produce it?

It is evident, from their method of propagation, that a couple of cats, in fifty years, would stock a whole kingdom; and if that religious veneration were still paid them, it would, in twenty more, not only be easier in Egypt to find a god than a man, which Petronius says was the case in some parts of Italy; but the gods must at last entirely starve the men, and leave themselves neither priests nor votaries remaining.

Self-denial is a monkish virtue.

The consequence of a very free commerce between the sexes, and of their living much together, will often terminate in intrigues and gallantry.

A pleasant comedy, which paints the manners of the age, and exposes a faithful picture of nature, is a durable work, and is transmitted to the latest posterity. But a system, whether physical or metaphysical, commonly owes its success to its novelty; and is no sooner canvassed with impartiality than its weakness is discovered.