If you have an apple and I have an apple, and we exchange apples, we both still only have one apple. But if you have an idea and I have an idea, and we exchange ideas, we each now have two ideas.

人类天生善良，所以他犯罪是违背自己的意愿。

音乐可以改变世界，因为它可以改变人的思想。

剑鞘保护剑的锋利，自己却满足於它自己的迟钝。