When you smile at someone and they smile back, you automatically feel better. Even if they don't smile back, you will feel better because you know the most destitute（穷困的） person in the world is the one without a smile. You immediately become richer by giving that person yours.
The same goes for the compliment. When you sincerely compliment a person or extend him a courtesy, he is going to receive a direct benefit and like himself better. It is impossible for you to make someone feel better and no feel better yourself.
相关单词：destitute
destitute解释：adj.缺乏的；穷困的
destitute例句：
They were destitute of necessaries of life.他们缺少生活必需品。
They are destitute of common sense.他们缺乏常识。
