If you can't be satisfied with what you have received, be thankful for what you have escaped. Cats look down on you. Only the pig looks you in the eye. Eagles may soar, but weasels don't get sucked into jet engines. Err, and err, and err again but less, and less, and less.
Age is a very high price to pay for maturity.
If you can't do it well but have to do it, learn to enjoy doing it badly.