"The immune system is like a double-edged sword; it can fight cancer but also needs to be controlled."

政治衰败的过程与政治发展一样自然。

"Books are the maps that guide us through life."

When a person realizes he has been deeply heard, his eyes moisten. I think in some real sense he is weeping for joy. It is as though he were saying, "Thank God, somebody heard me. Someone knows what it's like to be me."