A life of wealth and many belongings is only a means to happiness. Honor, power, and success cannot be happiness because they depend on the whims of others, and happiness should be self-contained, complete in itself.

The good man is he for whom, because he is virtuous, the things that are absolutely good are good; it is also plain that his use of these goods must be virtuous and in the absolute sense good.

The fool tells me his reason; the wise man persuades me with my own.

People become house builders through building houses, harp players through playing the harp. We grow to be just by doing things which are just.

Again, the male is by nature superior, and the female inferior; and the one rules, and the other is ruled; this principle, of necessity, extends to all mankind.

The continuum is that which is divisible into indivisibles that are infinitely divisible.

The ultimate end...is not knowledge, but action. To be half right on time may be more important than to obtain the whole truth too late.