Fearlessness stems from selflessness.; Only the selfless can be fearless.

无私故能无畏。

《新英汉大辞典》

Thanks for your hard work and selflessness.

谢谢你的辛勤工作和无私奉献。

youdao

After Sonora became an adult, she understood the strength and selflessness her father had shown in raising his children as a single parent.

在索诺拉成年后，她理解了她的父亲作为单亲父亲在抚养孩子方面所体现出的力量和无私。

youdao

Charity, or what he seems to have been thinking of as the selflessness of Christian love, is a virtue generous and capacious enough to encompass all of the others but faith, hope and chastity? "And the greatest of these is chastity"?

仁爱，或者,他认为的基督教无私的爱，是一种足够宽广，能够涵盖其他美德的美德,但是，信念，希望，贞操？最重要的是贞操？

耶鲁公开课 - 弥尔顿课程节选

Economists, typically baffled by selflessness, have tended to hunt for hidden self-interest in apparent altruism.

ECONOMIST: Why a new golden age of philanthropy may be dawning

In fact, it can be very difficult to spot when the ego masquerades as selflessness.

FORBES: Your Ego and the Bad Decisions It Makes

Their caring, fundraising, mentoring and selflessness makes Britain a more contented, supportive, better-adjusted and happier place.

BBC: Newspaper review: Press looks to local elections