Disqualified for Ministry by My Ailing Legalist Friends

As a young man I was told that I should run, but not really taught the appropriate reasons why or instructed how. I ran like a fool, superficially motivated and ignorant, so suffered numerous injuries. However, the failures motivated me to seek a better way. Today, after many years, I have slowly learned the appropriate motivations and proper mechanics for injury-free running and have been reestablished in health. I also now provide guidance for running to others, saving them from my foolish mistakes and injuries. Still my heart attack-waiting-to-happen, frail, feeble legalist friends whisper that I should not attempt to instruct others in this way because I was once injured, so now am disqualified.