你不舒服就是个理由。

You are uncomfortable is the reason.

youdao

最有“意义”的理由和好处就是你至少回答过三次“是没错，但关我啥事？”

The most compelling andmotivating reason/benefit is almost always the thing you say only afteryou've answered at least three "Yeah, but WHY do I care?"

youdao

这个就是你的动机——你做某事的理由。

This is your motivation -your reason for doing it.

youdao

So, if you're looking for another reason to quit, if you're looking for a reason not to start smoking, here's another good one.

因此，如果你正在寻找戒烟的另一个理由，如果你正在寻找一个不开始吸烟的理由，这就是很好的一个。

麻省理工公开课 - 化学原理课程节选