The shape of the heaven is of necessity spherical; for that is the shape most appropriate to its substance and also by nature primary.

Some men turn every quality or art into a means of making money; this they conceive to be the end, and to the promotion of the end all things must contribute.

Our actions determine our dispositions.

Democracy is the form of government in which the free are rulers.

What has soul in it differs from what has not, in that the former displays life. Now this word has more than one sense, and provided any one alone of these is found in a thing we say that thing is living. Living, that is, may mean thinking or perception or local movement and rest, or movement in the sense of nutrition, decay and growth. Hence we think of plants also as living, for they are observed to possess in themselves an originative power through which they increase or decrease in all spatial directions.

Man's best friend is one who wishes well to the object of his wish for his sake, even if no one is to know of it.

Excellence or virtue in a man will be the disposition which renders him a good man and also which will cause him to perform his function well.