Hi, Jack, 首先，标题是不是多打了一个字呢？我查到的是「天下皆知取之为取，而莫知与之为取。」 如果是的话，我们先释义：人们都认为只有获取别人的东西才是收获，却不知道给予别人也是一种收获。 释义如果也没错的话，就可以试着翻翻看了： It is commonly known that to take is a gain. Little do they know that to give can also be a gain. 拙译仅供参考，祈能有抛砖之效。

same as Austin, maybe same mean as: no pain, no gain.