However unhappy a man may be, the moment he knows the purpose of his life a switch is turned and the light is on. He may not be able to accomplish anything at once, but the very fact of knowing the purpose gives him all the hope and vigor and inspiration and strength to wait for that day. If he has to strive after that purpose all his life, he does not mind so long as he knows what the purpose is. Ten such persons have much greater power than a thousand people working from morning till evening not knowing the purpose of their life.