It is like a one way street.
If you go down the wrong way, you may be blocked and will have to backup, sometimes backing up a long way.
You can't buy it.
You can't borrow it.
You can't lend it.
You may be able to benefit from it, but it will require work on your part.
It takes Time to create.
The shorter the Time, usually the less of it you can expect.
It is like wealth, it grows when you add to it and reduces or disappears altogether when it is lost.
What Is It?