What are the sentences that express "I want to do something but I can't"?

The meaning of this sentence is powerless:

Those words used to comfort others will never comfort themselves.

Lying in bed is like falling into an endless quagmire, helpless.

Love is a pure emotion, sometimes willing, sometimes powerless.

We are like needles on the surface, turning and turning, watching time pass by in a hurry, but there is nothing we can do.

Sadness, silence and heartache at that time were just four words: powerlessness.

Letting nature take its course is just a good way to say that there is nothing you can do.

There is nothing I can do, because I don't know why you are sad, and I am even more afraid that I can't do anything after knowing why you are sad.

Because there is nothing to do, let nature take its course, because the heart has no belonging, so let nature take its course.