Think as wise men do, but speak as the common people do.
Quid quid movetur ab alio movetur"(nothing moves without having been moved).
A friend is simply one soul in two bodies.
We do not act rightly because we have virtue or excellence. But they hesitate, waiting for the other fellow to make the first move-and he, in turn, waits for you.
It is the repeated performance of just and temperate actions that produces virtue.
For we do not think that we know a thing until we are acquainted with its primary conditions or first principles, and have carried our analysis as far as its simplest elements.