Nature does nothing in vain.
Men become builders by building and lyreplayers by playing the lyre; so too we become just by doing just acts, temperate by doing temperate acts, brave by doing brave acts.
The best way to teach morality is to make it a habit with children.
If the art of ship-building were in the wood, ships would exist by nature.
Our actions determine our dispositions.
The hardest victory is the victory over self.