It's the notion of knowing exactly what needs to be done, but lacking the nerve to do it; the apprehension to your aspirations.

从概念上讲，我们知道我们必须要做什么，但是却没有勇气去做；这就是对你的志向的忧虑。

youdao

If you don't, you may be giving the impression that you are not confident, lacking in-depth knowledge regarding the job or the organization, not keen in learning, or do not have an inquisitive mind.

如果你不提问，很可能给面试官留下不够自信、缺乏对面试机构以及面试职位的了解、不愿意学习或者对新事物没有好奇心等不良印象。

youdao

We know what needs to be done, what is lacking is the political will to do it.

我们知道该做什么，所缺少的就是做事的决心。

youdao

En route, it was boarded by the U.S. Navy, which reportedly found weapons aboard, took photos, but then--lacking authority to do anything more--let the ship sail on.

FORBES: Freedom's Edge

"When (a futures commission merchant's) financial risk controls are so lacking that they do virtually nothing to prevent an unchecked customer from taking grossly excessive trading risks as happened here, a harmful domino effect of financially dangerous consequences can follow, affecting not only the FCM but also potentially other customers and the market at large, " said David Meister, the CFTC's enforcement director.

WSJ: FCStone fined $1.5 million in CFTC settlement

Instead of criticising diaspora Jews for standing up for Israel, you should fault the rest of the world for lacking the courage to do so.

ECONOMIST: On the diaspora