"Seek not the good in external things; seek it in yourselves." —Epictetus

"As a matter of self-perseveration, a man needs good friends or ardent enemies, for the former instruct him and the latter take him to task." —Diogenes

"Waste no more time arguing what a good man should be. Be one." —Marcus Aurelius

"Hang on to your youthful enthusiasms you’ll be able to use them better when you’re older." —Seneca

"Do not spoil what you have by desiring what you have not." —Epicurus

"Why should we pay so much attention to what the majority thinks?" —Socrates

"A room without books is like a body without a soul." —Cicero

"Be tolerant with others and strict with yourself." —Marcus Aurelius

"And you can also commit injustice by doing nothing." —Marcus Aurelius

"Only the dead have seen the end of war." —Plato

"The foundation of every state is the education of its youth." —Diogenes

"The greater the difficulty, the more glory in surmounting it. Skillful pilots gain their reputations from storms and tempests." —Epictetus

"Man’s character is his fate." —Heraclitus, Fragments

"Nothing exists except atoms and free space, everything else is opinion." —Democritus

"The Fates guide the person who accepts them and hinder the person who resists them." —Cleanthes

"In anger we should refrain both from speech and action." —Pythagoras

"Before a crowd, the ignorant are more persuasive than the educated." —Aristotle

"Misfortune nobly born is good fortune." —Marcus Aurelius

"Love is a serious mental disease." —Plato, Phaedrus

"Six mistakes mankind keeps making century after century: Believing that personal gain is made by crushing others; Worrying about things that cannot be changed or corrected; Insisting that a thing is impossible because we cannot accomplish it; Refusing to set aside trivial preferences; Neglecting development and refinement of the mind; Attempting to compel others to believe and live as we do." —Cicero