[Bjartr]

Or, to put it another way

Have the grace to accept things I cannot change, the power to change the things I can, and the wisdom to know the difference.

An intelligent person usually knows a lot about a lot. The more things you know about, the more chances you have to make a mistake and think changing something is in your court, when it's really not.

[Astro-Domine]

I agree with that.

Another type of problem with this particular person was the insight that there is no meaning to be discovered, distilled or coaxed out of analysis.

That we must create meaning is an example of something which is entirely in their court but which they somehow can’t accept and proceed with.

[padjo]

You can know something is not within your power to change and still find the fact of its existence deeply upsetting.

[Bjartr]

That's why the saying I quoted had "the grace to accept the things I cannot change"

It's not "accept things that are not upsetting"