The real art of conversation is not only to say the right thing at the right place but to leave unsaid the wrong thing at the tempting moment.
真正的谈话艺术不仅是在正确的地方说正确的话，而且是在诱惑的时刻不说错误的话。
The will to learn is an intrinsic motive, one that finds both its source and its reward in its own exercise.