Truth is a good dog; but always beware of barking too close to the heels of an error, lest you get your brains kicked out.

The Idols of Tribe have their foundation in human nature itself, and in the tribe or race of men. For it is a false assertion that the sense of man is the measure of things. On the contrary, all perceptions as well of the sense as of the mind are according to the measure of the individual and not according to the measure of the universe. And the human understanding is like a false mirror, which, receiving rays irregularly, distorts and discolors the nature of things by mingling its own nature with it.

Knowledge hath in it somewhat of the serpent, and therefore where it entereth into a man it makes him swell.

Age appears to be best in four things; old wood best to burn, old wine to drink, old friends to trust, and old authors to read.

They are the best physicians, who being great in learning most incline to the traditions of experience, or being distinguished in practice do not reflect the methods and generalities of art.

Death is a friend of ours; and he that is not ready to entertain him is not at home.

And as for Mixed Mathematics, I may only make this prediction, that there cannot fail to be more kinds of them, as nature grows further disclosed.