Many of us prefer to explain our generous actions simply by invoking our good character.We feel better if we help others and share with them.But where does this inner glow come from?

• 许多学者倒宁可以发扬人性良善面来解释人类的慷慨义行，助人或与他人分享，原本就是人生一大乐事，但是这种内在的人性光辉究竟源自何处？