He for himself weaves woe who weaves for others woe, and evil counsel on the counselor recoils.

Men must sweat to attain virtue.

Actions from youth, advice from the middle-aged, prayers from the aged.

Mortals grow swiftly in misfortune.

For now indeed is the race of iron; and men never cease from labour and sorrow by day and from perishing by night.

...Perses, hear me out on justice, and take what I have to say to heart; cease thinking of violence. For the son of Kronos, Zeus, has ordained this law to men: that fishes and wild beasts and winged birds should devour one another, since there is no justice in them; but to mankind he gave justice which proves for the best.

The fool knows after he has suffered.