Everything is what it is， and not another thing.

正该来时，先生（老子）应时来到这世间；正该去时，先生顺时离开这世间。安于时势，顺应自然规律，哀乐就不能进入心中。

解释：脚力不强劲，行程就不会远；刀刃不锋利，割东西就不会深。

"The world is indeed full of peril, and in it there are many dark places; but still there is much that is fair, and though in all lands love is now mingled with grief, it grows perhaps the greater."

人生就是一连串的选择。