不劳不获；要想吃果仁，必须破果皮。

He that will eat the kernel must crack the nut.

youdao

虽然说不劳不获，但努力工作也未必可以升职。

No pains, no gains. But working hard not always gets a promotion.

youdao

It's defined in many ways that "no pain, to gain" paradigm, whether it's education of doctors or in school, as well as generally in the workplace.

它在很多方面定义了“不劳无获，不论是对医生的教育还是在学校，在一般的工作场所也一样。

哈佛公开课 - 幸福课课程节选