There is only one vice, which may be found in life with as strong features, and as high a colouring as needs be employed by any satyrist or comic poet; and that is AVARICE.

The many instances of forged miracles, and prophecies, and supernatural events, which, in all ages, have either been detected by contrary evidence, or which detect themselves by their absurdity, prove sufficiently the strong propensity of mankind to the extraordinary and marvellous, and ought reasonably to begat a suspicion against all relations of this kind.

And indeed nothing but the most determined scepticism, along with a great degree of indolence, can justify this aversion to metaphysics. For if truth be at all within the reach of human capacity, it is certain it must lie very deep and abstruse: and to hope we shall arrive at it without pains, while the greatest geniuses have failed with the utmost pains, must certainly be esteemed sufficiently vain and presumptuous. I pretend to no such advantage in the philosophy I am going to unfold, and would esteem it a strong presumption against it, were it so very easy and obvious.

Your corn is ripe today, mine will be so tomorrow. 'Tis profitable for us both that I should labor with you today, and that you should aid me tomorrow. I have no kindness for you, and know you have as little for me. I will not, therefore, take any pains upon your account . . . Here then I leave you to labor alone; you treat me in the same manner. The seasons change, and both of us lose our harvests for want of mutual confidence and security.

No amount of observations of white swans can allow the inference that all swans are white, but the observation of a single black swan is sufficient to refute that conclusion.

Nothing is more dangerous to reason than the flights of the imagination and nothing has been the occasion of more mistakes among philosophers.

But there still prevails, even in nations well acquainted with commerce, a strong jealousy with regard to the balance of trade, and a fear, that all their gold and silver may be leaving them. This seems to me, almost in every case, a groundless apprehension; and I should as soon dread, that all our springs and rivers should be exhausted, as that money should abandon a kingdom where there are people and industry.