英语翻译i have been left with the knowledge that it's to expect

这句话有点问题,但似乎可以看出想说什么.
可能是应该这样的:
i have been left with the knowledge that it's (Better) to expect nothing than to give everything and THEN be disappointed.
我最终只弄明白了一点：与其付出所有而最终失望,不如根本不去期望什么.

我已经离开了，只学到一点：不期望任何事情比付出一切更令人失望。

我一直的知识，它的期望只是让一切比离开感到失望。