The path to discovery is rarely a straight line.
The best way to predict the future is to invent it.
It is one thing to show a man that he is in an error, and another to put him in possession of truth.
向一个人展示他在错误中是一回事，让他掌握真理是另一回事。
It is remarkable that a science which began with the consideration of games of chance should have become the most important object of human knowledge.