Ask HN: What is a failure of yours that was motivating or enlightening?

There is a theme of accepting failure and being open about failure during the pursuit of success in today's submissions, and the community seems to be interested in the topic particularly today. I was curious if HNers would be willing to share any memorable or insightful failures in their lives. Current Top Submissions on the Theme: 1. https://news.ycombinator.com/item?id=10047721 2. https://news.ycombinator.com/item?id=10046226