the weight room: accept 99% error
Then you are willing to make mistakes, you see. You are saying you will accept 99% error. The paralyzed perfectionist you say you are would stand there before that door. Jingling the keys. Afraid to try the first key.
Context
The parable's landing, and the anthology's clearest statement that E.T.A.'s real coaching is about fear, not conditioning: Rader's willingness to try every key means "you will accept 99% error," while "the paralyzed perfectionist" stands frozen, "afraid to try the first key." Lyle diagnoses the athletic problem as a psychological one — the perfectionism that can't tolerate the near-certain failure every attempt entails — and prescribes the acceptance of error as the door to the player you want to be. It is 130's managed-fear doctrine in miniature, coached in a whisper over the clanking iron.