He who says either that the time for philosophy has not yet come or that it has passed is like someone who says that the time for happiness has not yet come or that it has passed.

Justice is never anything in itself, but in the dealings of men with one another in any place whatever and at any time. It is a kind of compact not to harm or be harmed.

It is impossible to live a pleasant life without living wisely and honorably and justly, and it is impossible to live wisely and honorably and justly without living pleasantly. Whenever any one of these is lacking, when, for instance, the man is not able to live wisely, though he lives honorably and justly, it is impossible for him to live a pleasant life.

It is not the young man who should be considered fortunate but the old man who has lived well, because the young man in his prime wanders much by chance, vacillating in his beliefs, while the old man has docked in the harbor, having safeguarded his true happiness.

Many friends are the key to happiness

Natural justice is a compact resulting from expediency by which men seek to prevent one man from injuring others and to protect him from being injured by them.

Those desires that do not bring pain if they are not satisfied are not necessary; and they are easily thrust aside whenever to satisfy them appears difficult or likely to cause injury.