Sophocles

To revive sorrow is cruel.

Who feels no ills, should, therefore, fear them; and when fortune smiles, be doubly cautious, lest destruction come remorseless on him, and he fall unpitied.

O generations of men, how I count you as equal with those who live not at all!

The keenest sorrow is to recognize ourselves as the sole cause of all our adversities.

Death is not the worst thing; rather, when one who craves death cannot attain even that wish.

How terrible it is to have wisdom when it does not benefit those who have it.

Much speech is one thing, well-timed speech is another.

The end excuses any evil.

A short saying oft contains much wisdom.

What you cannot enforce, do not command.