Of course we all have our limits, but how can you possibly find your boundaries unless you explore as far and as wide as you possibly can? I would rather fail in an attempt at something new and uncharted than safely succeed in a repeat of something I have done.
"The Best Thing To Give To Your Enemy Is Forgiveness; to An Opponent, Tolerance; To A Friend, Your Heart; to Your Child, A Good Example; To A Father, deference; To Your Mother, Conduct That Will Make her Proud Of You; To Yourself, Respect; To All Others, Charity."
Mistakes are a part of being human. Appreciate your mistakes for what they are: precious life lessons that can only be learned the hard way. Unless it's a fatal mistake, which, at least, others can learn from.