> , I meant confidence comes from achievements

Confidence coming from achievements is a terrible foundation for real confidence.

I did all kinds of things, and still found ways to doubt myself or think my purpose was exhausted.

Confidence from enjoying growth and knowing I can improve and be valuable no matter what the outcome of what I'm doing now is a much more solid footing. Plus, it makes me try harder, too, instead of having my "achievements" called into question by each failure.