People too smart to get involved in politics are doomed to live in societies run by people who aren't.

Both poverty and wealth, therefore, have a bad effect on the quality of the work and the workman himself. Wealth and poverty, I answered. One produces luxury and idleness and a passion for novelty, the other meanness and bad workmanship and revolution into the bargain.

To conquer oneself is the best and noblest victory; to be vanquished by one's own nature is the worst and most ignoble defeat.

The blame is his who chooses: God is blameless.

But he who has been earnest in the love of knowledge and of true wisdom, and has exercised his intellect more than any other part of him, must have thoughts immortal and divine. If he attain truth, and in so far as human nature is capable of sharing in immortality, he must altogether be immortal.

That makes me think, my friend, as I have often done before, how natural it is that those who have spent a long time in the study of philosophy appear ridiculous when they enter the courts of law as speakers. Those who have knocked about in courts and the like from their youth up seem to me, when compared with those who have been brought up in philosophy and similar pursuits, to be as slaves in breeding compared with freemen.

Those who are not schooled and practised in truth [who are not honest and upright men] can never manage aright the government, nor yet can those who spend their lives as closet philosophers; because the former have no high purpose to guide their actions, while the latter keep aloof from public life.