Happiness is a good flow of life. 

That which exercises reason is more excellent than that which does not exercise reason; there is nothing more excellent than the universe, therefore the universe exercises reason.

A bad feeling is a commotion of the mind repugnant to reason, and against nature.

No evil is honorable; but death is honorable; therefore death is not evil.

We have two ears and one mouth, so we should listen more than we say.

All the good are friends of one another.

Love is a God, who cooperates in securing the safety of the city.

(The end is) life in agreement with nature.

No one entrusts a secret to a drunken man; but one will entrust a secret to a good man; therefore, the good man will not get drunk.

If melodiously piping flutes sprang from the olive, would you doubt that a knowledge of flute-playing resided in the olive? And what if plane trees bore harps which gave forth rhythmical sounds? Clearly you would think in the same way that the art of music was possessed by plane trees. Why, then, seeing that the universe gives birth to beings that are animate and wise, should it not be considered animate and wise itself?