Everything in nature is a cause from which there flows some effect.

Fear cannot be without hope nor hope without fear.

I have tried sedulously not to laugh at the acts of man, nor to lament them, nor to detest them, but to understand them.

If a man had begun to hate an object of his love, so that love is thoroughly destroyed, he will, causes being equal, regard it with more hatred than if he had never loved it, and his hatred will be in proportion to the strength of his former love.

Happiness is not the reward of virtue, but is virtue itself; nor do we delight in happiness because we restrain from our lusts; but on the contrary, because we delight in it, therefore we are able to restrain them.

Blessedness is not the reward of virtue but virtue itself.

Nothing in nature is by chance... Something appears to be chance only because of our lack of knowledge.