Memorable feedback

The day after solo/ensemble festival in high school, during which students performed before judges from various high schools and colleges, our orchestra director would read the evaluations of each performance aloud.  I've never forgotten one bit of advice a judge gave a student.  "Never say, 'I messed up,'" she wrote.  "I might not have noticed."  Interesting advice for an instrumentalist--and applicable in life, at least part of the time.