You cannot measure a man by his failures. You must know what use he makes of them. What did they mean to him. What did he get out of them. Orison Swett Marden
You cannot of yourself move your arm or alter your position, situation, posture, do to other men good or evil, or effect the least change in the world. Nicolas Malebranche
You cannot raise the standard against oppression, or leap into the breach to relieve injustice, and still keep an open mind to every disconcerting fact, or an open ear to the cold voice of doubt. Learned Hand
You cannot run away from weakness; you must some time fight it out or perish; and if that be so, why not now, and where you stand? Robert Louis Stevenson