言语有治愈和毁灭的力量。
"Words have the power to heal and to destroy."
Happiness in intelligent people is the rarest thing I know.
气候变化是本世纪的战斗，我们必须赢得胜利。
"Always be transparent about the limitations of your study."
社会学的想象力使我们能够把握历史和传记以及两者在社会中的关系。
"Some infinities are bigger than other infinities."
You just once young but may be immature indefinitely.
Cryptography is about communication in the presence of adversaries.