For the correct analogy for the mind is not a vessel that needs filling, but wood that needs igniting.

Nothing can produce so great a serenity of life as a mind free from guilt and kept untainted, not only from actions, but purposes that are wicked. By this means the soul will be not only unpolluted but also undisturbed. The fountain will run clear and unsullied.

The wildest colts make the best horses.

A Spartan woman, as she handed her son his shield, exhorted him saying, "As a warrior of Sparta come back with your shield or on it."

For, in the language of Heraclitus, the virtuous soul is pure and unmixed light, springing from the body as a flash of lightning darts from the cloud. But the soul that is carnal and immersed in sense, like a heavy and dank vapor, can with difficulty be kindled, and caused to raise its eyes heavenward.

The omission of good is no less reprehensible than the commission of evil.

Choose what is best, and habit will make it pleasant and easy.