No one chooses what does not rest with himself, but only what he thinks can be attained by his own act.

Suppose, then, that all men were sick or deranged, save one or two of them who were healthy and of right mind. It would then be the latter two who would be thought to be sick and deranged and the former not!

For both excessive and insufficient exercise destroy one's strength, and both eating and drinking too much or too little destroy health, whereas the right quantity produces, increases and preserves it. So it is the same with temperance, courage and the other virtues. This much then, is clear: in all our conduct it is the mean that is to be commended.

The two qualities which chiefly inspire regard and affection are that a thing is your own and that it is your only one.

The body is most fully developed from thirty to thirty-five years of age, the mind at about forty-nine.

Evil draws men together.

It is through wonder that men now begin and originally began to philosophize; wondering in the first place at obvious perplexities, and then by gradual progression raising questions about the greater matters too.