All men have the capacity of knowing themselves and acting with moderation.

I am what libraries and librarians have made me, with little assistance from a professor of Greek and poets

Big results require big ambitions.

All things flow, nothing abides. You cannot step into the same river twice, for the waters are continually flowing on. Nothing is permanent except change.

You won't discover the limits of the soul, however far you go.

Men who are lovers of wisdom [i.e., philosophers] must be inquirers into many things.

The unexpected connection is more powerful than one that is obvious.