Mark Batterson writes in his book, In a Pit with a Lion on a Snowy Day:

I recently went to the doctor's office for an extensive battery of allergy tests. My doctor wanted to find out what allergens trigger my asthma. The nurse-practitioner pricked my forearm in 18 places with different allergens and said, "Don't scratch." It was like Chinese water torture. I had to resist the urge to scratch the itch for 15 of the longest minutes of my life!

But testing for allergies isn't a pointless exercise in cruel and unusual punishment, even though it might seem like it. It is a form of reverse engineering. My doctor wasn't satisfied with treating my allergy symptoms. She wanted to discover the root causes of my reactions. And the solution isn't just avoiding those allergens. The cure is actually exposing myself to them in small doses.

Here is my point. The cure for the fear of failure is not success. It's failure. The cure for the fear of rejection is not acceptance. It's rejection. You've got to be exposed to small quantities of whatever you're afraid of. That's how you build up immunity.