The happiness and unhappiness of men depends as much on their ethics as on fortune.
We often do shallow good in order to accomplish evil with impunity.
We give nothing so freely as advice.
It is safer to do most men harm than to do them too much good.
The temperament that produces a talent for little things is the opposite of that required for great ones.
Jealousy lives upon doubts. It becomes madness or ceases entirely as soon as we pass from doubt to certainty.