I think rationality is a kind of idealization.

The first step in the art of cutting metals is to find a man who has the necessary skill and experience.

译文：祸到临头后悔已经来不及了，船驶到江心弥补漏洞已经无济于事。赏析：我们说话做事都要谨慎，凡事都做最坏的打算，要防患于未然才能减少失误和差错。

我们必须倾听客户的声音，他们是我们存在的理由。