Not to know of what things one should demand demonstration, and of what one should not, argues want of education.

Dignity does not consist in possessing honors, but in deserving them.

The art of wealth-getting which consists in household management, on the one hand, has a limit; the unlimited acquisition of wealth is not its business. And therefore, in one point of view, all riches must have a limit; nevertheless, as a matter of fact, we find the opposite to be the case; for all getters of wealth increase their hard coin without limit.

Neither by nature, then, nor contrary to nature do the virtues arise in us; rather we are adapted by nature to receive them, and are made perfect by habit.

Evil draws men together.

Anybody can become angry - that is easy, but to be angry with the right person and to the right degree and at the right time and for the right purpose, and in the right way - that is not within everybody's power and is not easy.

If then nature makes nothing without some end in view, nothing to no purpose, it must be that nature has made all of them for the sake of man.