It is not the critic who counts. The credit belongs to the man who is actually in the arena; whose face is marred by the dust and sweat and blood; who strives valiantly; who errs and comes short again and again; who knows the great enthusiasms, the great devotions and spends himself in a worthy course; who at best, knows in the end the triumph of high achievement, and who, at worst, if he fails, at least fails while daring greatly; so that his place shall never be with those cold and timid souls who know neither victory nor defeat.  
    --Theodore Roosevelt

Nearly all men can withstand adversity; if you want to truly test a man's character, give him power.
    --Abraham Lincoln

Our deepest fear is not that we are inadequate. Our deepest fear is that we are powerful beyond measure. It is our light, not our darkness that most frightens us. We ask ourselves, Who am I to be brilliant, gorgeous, talented, or fabulous? Actually, who are you not to be? Playing small does not serve the world. There is nothing enlightened about shrinking down so that others don't feel insecure around you. We are all meant to shine; Children do. We were born to make manifest the Glory of God that is within us. Not just in some of us; it is in every one. As we let our own light shine, we unconsciously give others permission to do the same. When I am liberated from fear, my presence automatically liberates others.  
    --Marianne Williamson

The best people possess a feeling for beauty, the courage to take risks, the discipline to tell the truth, the capacity for sacrifice.  Ironically, these virtues make them vulnerable; they are often wounded, and sometimes destroyed.
    --Ernest Hemingway

It was miraculous. It was almost no trick at all, he saw, to turn vice into virtue and slander into truth, impotence into abstinence, arrogance into humility, plunder into philanthropy, thievery into honor, blasphemy into wisdom, brutality into patriotism, and sadism into justice. Anybody could do it; it required no brains at all. It merely required no character.
    --Joseph Heller