Example is the best precept.
I am sure the grapes are sour.
The grateful heart will always find opportunities to show its gratitude.
The haft of the arrow had been feathered with one of the eagle's own Lures. We often give our enemies the means of our own destruction.
All men are more concerned to recover what they lose than to acquire what they lack.
Better to learn wisdom from other people's misfortunes than from your own.