Plutarch said:

I don't need a friend who changes when I change and who nods when I nod; my shadow does that much better.

What we achieve inwardly will change outer reality.

A few vices are sufficient to darken many virtues.

A Roman divorced from his wife, being highly blamed by his friends, who demanded, "Was she not chaste? Was she not fair? Was she not fruitful?" holding out his shoe, asked them whether it was not new and well made. "Yet," added he, "none of you can tell where it pinches me.

All men whilst they are awake are in one common world: but each of them, when he is asleep, is in a world of his own.

An imbalance between rich and poor is the oldest and most fatal ailment of all republics.

Character is simply habit long continued.

Do not speak of your happiness to one less fortunate than yourself.

I would rather excel in the knowledge of what is excellent, than in the extent of my power and possessions.

If I were not Alexander, I would be Diogenes.