"We are at the mercy of whoever wields authority over the things we either desire or detest. If you would be free, then, do not wish to have, or avoid, things that other people control, because then you must serve as their slave."
"It is not events that disturb people, it is their judgements concerning them."
"Any person capable of angering you becomes your master; he can anger you only when you permit yourself to be disturbed by him."
"Faced with pain, you will discover the power of endurance. If you are insulted, you will discover patience. In time, you will grow to be confident that there is not a single impression that you will not have the moral means to tolerate."
"On the occasion of every accident that befalls you, remember to turn to yourself and inquire what power you have for turning it to use."
"So remember this principle when something threatens to cause you pain: the thing itself was no misfortune at all; to endure it and prevail is great good fortune."
"Difficulties strengthen the mind, as labor does the body."
"Man is not worried by real problems so much as by his imagined anxieties about real problems."