"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

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

"Don’t be overheard complaining…not even to yourself." —Marcus Aurelius

"Most people, when they are set upon looking into other people’s affairs, never turn to examine themselves." —Xenophon, Conversations Of Socrates

"No man is more unhappy than he who never faces adversity. For he is not permitted to prove himself." —Seneca

"To move the world, we must first move ourselves." —Socrates

"Quality is not an act, it is a habit." —Aristotle

"Rather fail with honor than succeed by fraud." —Sophocles

"In your actions, don’t procrastinate. In your conversations, don’t confuse. In your thoughts, don’t wander. In your soul, don’t be passive or aggressive. In your life, don’t be all about business." —Marcus Aurelius

"He who conquers his passions is master of his own worlds." —Hierocles

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

"We are more often frightened than hurt; and we suffer more in imagination than in reality." —Seneca

"Reject your sense of injury and the injury itself disappears." —Marcus Aurelius

"The greatest wealth is to live content with little." —Plato

"We must take a higher view of all things, and bear with them more easily: it better becomes a man to scoff at life than to lament over it." —Seneca

"He who has equipped himself for the whole of life does not need to be advised concerning each separate thing, because he is now trained to meet his problem as a whole; for he knows not merely how he should live with his wife or his son, but how he should live aright." —Aristo Of Chios

"Rather fail with honor than succeed by fraud." —Sophocles

"Don’t be overheard complaining…not even to yourself." —Marcus Aurelius

"Wait for that wisest of all counselors: time." —Pericles

"Wealth is able to buy the pleasures of eating, drinking and other sensual pursuits—yet can never afford a cheerful spirit or freedom from sorrow." —Musonius Rufus, Musonius Rufus On How To Live