... the friendship of worthless people has a bad effect (because they take part, unstable as they are, in worthless pursuits, and actually become bad through each other's influence). But the friendship of the good is good, and increases in goodness because of their association. They seem even to become better men by exercising their friendship and improving each other; for the traits that they admire in each other get transferred to themselves.

Knowing what is right does not make a sagacious man.

But is it just then that the few and the wealthy should be the rulers? And what if they, in like manner, rob and plunder the people, - is this just?

Art completes what nature cannot bring to finish. The artist gives us knowledge of nature's unrealized ends.

...The entire preoccupation of the physicist is with things that contain within themselves a principle of movement and rest.

The society that loses its grip on the past is in danger, for it produces men who know nothing but the present, and who are not aware that life had been, and could be, different from what it is.

Those who are not angry at the things they should be angry at are thought to be fools, and so are those who are not angry in the right way, at the right time, or with the right persons.