The good are befriended even by weakness and defect. As no man had ever a point of pride that was not injurious to him, so no man had ever a defect that was not somewhere made useful to him. The stag in the fable admired his horns and blamed his feet, but when the hunter came, his feet saved him, and afterwards, caught in the thicket, his horns destroyed him. Every man in his lifetime needs to thank his faults. As no man thoroughly understands a truth until he has contended against it, so no man has a thorough acquaintance with the hindrances or talents of men until he has suffered from the one and seen the triumph of the other over his own want of the same. Has he a defect of temper that unfits him to live in society? Thereby he is driven to entertain himself alone and acquire habits of self-help; and thus, like the wounded oyster, he mends his shell with pearl.
Our strength grows out of our weakness. The indignation which arms itself with secret forces does not awaken until we are pricked and stung and sorely assailed. A great man is always willing to be little. Whilst he sits on the cushion of advantages, he goes to sleep. When he is pushed, tormented, defeated, he has a chance to learn something; he has been put on his wits, on his manhood; he has gained facts; learns his ignorance; is cured of the insanity of conceit; has got moderation and real skill.
-Ralph Waldo Emerson: Essays, First Series