But it never does anything to help; it invariably hinders; it sets one chasing shadows, produces _ignes fatui_ before the eyes, and ultimately leads one into the bog.
Elsewhere I have referred to the Indians' attitude of mind.

If a matter can be changed, change it; if not grin and bear it without complaint.

Here is practical wisdom.

But to worry over a thing that can be changed, instead of changing it, is the height of folly, and if a matter cannot be changed why worry over it?
How utterly useless is the worry.

Then, too, worry is the parent of nagging.