The divisions of science are not like different lines that meet in one angle, but rather like the branches of trees that join in one trunk.

Ask counsel of both timesof the ancient time what is best, and of the latter time what is fittest.

Who questions much, shall learn much, and retain much.

We think according to nature. We speak according to rules. We act according to custom.

If a man's wit be wandering, let him study the mathematics; for in demonstrations, if his wit be called away never so little, he must begin again.

The human understanding, from its peculiar nature, easily supposes a greater degree of order and equality in things than it really finds.

Disciples do owe their masters only a temporary belief, and a suspension of their own judgment till they be fully instructed.