Unit tests give me the confidence that my code works and that I can change it, at a moment's notice, without the fear of it breaking.

单元测试给我信心，让我相信我的代码能够工作，而且我只要看一下，可以修改它，就不会害怕它会崩溃。

youdao

Growth: to have the courage to meet new challenges and the confidence to change old customs. To grow without fear of failure of uncertainty.

成长：勇于尝试、挑战旧俗、不惧失败，在变化及不确定性中成长。

youdao

Freedom is the ability to change jobs or start your own business without the fear of losing your health insurance.

WHITEHOUSE: Remarks by the President at a Campaign Event -- Fairfax, VA