书籍是连接我们彼此的桥梁。
"The principles of a free society are essential for human progress and prosperity."
一个人直到能够超越个人利益的狭隘局限，关注整个人类的利益，他才真正开始生活。
The probability of a response is determined by its reinforcement history.
生命的最大用处是将它用于比生命更长久的事物上。
His soul swooned slowly as he heard the snow falling faintly through the universe and faintly falling, like the descent of their last end, upon all the living and the dead.