The person who succeeds is not the one who holds back, fearing failure, nor the one who never fails… but rather the one who moves on in spite of failure.

As Lowell wrote:
It's not failure, but low aim that's a crime.

As Teddy Roosevelt believed:
Far better it is to dare mighty things, to win glorious triumphs, even though checkered by failure, than to take rank with those poor spirits who neither enjoy much nor suffer much because they live in the gray twilight that knows neither victory or defeat.