The Four Agreements (1997)
Courageous quotes
page 3

“It is the greatest of all mistakes to do nothing because you can only do little.”
Lecture XIX : On the Conduct of the Understanding, Part II
Elementary Sketches of Moral Philosophy (1849)
“Courage can't see around corners but goes around them anyway.”
The Complete Neurotic's Notebook (1981), Unclassified

Force of Circumstances Vol. III (1963) as translated by Richard Howard (1968)
General sources
Context: Self-knowledge is no guarantee of happiness, but it is on the side of happiness and can supply the courage to fight for it. Psychiatrists have told me that they give The Second Sex to their women patients to read, and not merely to intellectual women but to lower-middle-class women, to office workers and women working in factories. 'Your book was a great help to me. Your book saved me,' are the words I have read in letters from women of all ages and all walks of life.
If my book has helped women, it is because it expressed them, and they in their turn gave it its truth. Thanks to them, it is no longer a matter for scandal and concern. During these last ten years the myths that men created have crumbled, and many women writers have gone beyond me and have been far more daring than I. Too many of them for my taste take sexuality as their only theme; but at least when they write about it they now present themselves as the eye-that-looks, as subject, consciousness, freedom.

“I learned that courage was not the absence of fear, but the triumph over it.”
1990s, Long Walk to Freedom (1995)
Context: I learned that courage was not the absence of fear, but the triumph over it. The brave man is not he who does not feel afraid, but he who conquers that fear.

“Courage is the ladder on which all the other virtues mount. ”

“There's no right or wrong, success or failure.”

Book Sometimes you win Sometimes you Learn

“Accept in an unruffled spirit that which is inevitable.”
Epistulae Morales ad Lucilium (Moral Letters to Lucilius), Letter XCVIX: On Consolation to the Bereaved

“It always seems impossible until it's done.”