To be conquered by yourself is of all things most shameful and vile.

Attention to health is life greatest hindrance.

The worst of all deceptions is self-deception.

The philosopher is in love with truth, that is, not with the changing world of sensation, which is the object of opinion, but with the unchanging reality which is the object of knowledge.

Consider how great is the encouragement which all the world gives to the lover; neither is he supposed to be doing anything dishonourable; but if he succeeds he is praised, and if he fail he is blamed.

When the tyrant has disposed of foreign enemies by conquest...and there is nothing to fear from them, then he is always stirring up some war

Fly from the company of the wicked--fly and turn not back.