未经反思的人生是半生,而传记就是那面镜子。
The probability of a response is determined by its reinforcement history.
The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.
言语有力量——明智地使用它们。
我得出的结论是,如果有人不喜欢真实的我,那是他们的损失。
I don't think you should ever have to apologize for your excitement.