If we pursue our habit of eating animals, and if our neighbour follows a similar path, will we need to go to war against our neighbour to secure greater pasturage, because ours will not be enough to sustain us, and our neighbour will have a similar need to wage war on us for the same reason.

In all of us, even in good men, there is a lawless wild-beast nature, which peers out in sleep.

True knowledge exists in knowing that you know nothing.

In every sort of danger there are various ways of winning through, if one is ready to do and say anything whatever.

Besides, it is a shame to let yourself grow old through neglect before seeing how you can develop the maximum beauty and strength of body; and you can have this experience if your are negligent, because these things don't normally happen by themselves.

Do it because it's in your heart. Not because you want something in return. Employ your time in improving yourself by other men's writings, so that you shall gain easily what others have labored hard for.

Who knows if to live is to be dead, and to be dead, to live? And we really, it may be, are dead; in fact I once heard sages say that we are now dead, and the body is our tomb.