A fall into the pit, a gain in your wit.

吃一堑，长一智。

《新英汉大辞典》

A fall into the pit, a gain in one's wit.

吃一堑，长一智。吃一堑，长一智。

youdao

What I found is that unless I am on top of my game and choosing to “be productive”, I easily fall back into the pit of procrastination, where time is never “of the essence”.

我发现，除非我为了选择“更有效率”而非玩游戏，不然我又会落入拖延的陷阱，在这点上时间从不是“本质原因”。

youdao

We know that those with so-called disabilities don't fall into the pity tar-pit and in fact, do better than they or anyone around them ever thought possible.

CNN: Amputees never say 'I can't'