Failure is really important!

I specialize in working with kids and teens who are consistently high performers in the classroom. And a lot of times, underneath it all, there's a ton of anxiety. They worry about failure. They get so focused on small things they've done wrong that they can't see the greater picture. So for people who have serious anxiety, an A- compared to an A is a huge difference. 

Failure helps you to gain perspective, and not lose the forest for the trees.