Your master is he who controls that on which you have set your heart or wish to avoid.

Appearances to the mind are of four kinds. Things either are what they appear to be; or they neither are, nor appear to be; or they are, and do not appear to be; or they are not, and yet appear to be. Rightly to aim in all these cases is the wise man's task.

Imagine for yourself a character, a model personality, whose example you determine to follow, in private as well as in public.

You ought to choose both physician and friend, not the most agreeable, but the most useful.

It is unreasonable to think we can earn rewards without being willing to pay their true price. It is always our choice whether or not we wish to pay the price for life's rewards.

It doesn't take much to lose everything, just a little departure from reason

You may fetter my leg, but Zeus himself cannot get the better of my free will.