"We speak much of the duty of making others happy. No day should pass, we say, on which we do not put a little cheer into some discouraged heart, make the path a little smoother for someone’s tired feet, or help some fainting robin unto its nest again. This is right. We cannot put too great emphasis upon the duty of giving happiness and cheer to others. But it is no less a duty that we should be happy and cheerful ourselves."