I don't think it is as much a human foible as it is a human curse that we cannot understand the beauty of a thing until it is gone.
A forte always makes a foible.
The common foible of women who have been handsome is to forget that they are no longer so.
Positiveness is a most absurd foible. If you are in the right, it lessens your triumph; if in the wrong, it adds shame to your defeat.