The past is not dead. It is not even past.
过去并没有死去。它甚至还没有过去。
人不是环境的产物;相反,环境允许或刺激他的发展。
世界只给予我一次,不是存在一个又感知一个。
True progress happens when we step out of our comfort zones and embrace change.
Mathematics is not a spectator sport. You have to get involved.