How many people ever consider that the lack of certain qualities - such as balance, common sense, tranquillity - affect the physical state of the human body?... Did you ever hear of people being sick because they hated someone? This is not uncommon.
Great occasions do not make heroes or cowards; they simply unveil them to the eyes of men. Silently and imperceptibly, as we wake or sleep, we grow strong or weak; and at last some crisis shows what we have become.