一切事物因缘而生，一切事物因缘而灭。

免疫系统就像一把双刃剑；它可以对抗癌症，但也需要被控制。

If you don't believe in yourself, no one else will.

Confucious said that real knowledge is knowing the extent of one's ignorance.Aristotle and Socrates said the same thing.Is it a skill that can be taught or learned? It probably can, if you have enough of a stake riding on the outcome...