Suicide was a noble thing when done in the right circumstances.
Other times we make love such a pure and noble thing, no poor human can ever meet our vision.
Maybe it was the most noble thing I ever did.
We know this because 'the world' made art the great and noble thing that it is.
But now you're saying 'Art is a great and noble thing'.
So the best we can do is one small noble thing!
This is a very noble and nice thing of you to do.
"I used to think this was a noble thing to be doing every day," he continued.
In any case, keeping it for the State is the noble thing to do.
He read all that stuff about it being a noble thing to die for your country, I expect.