“If you’ve never failed, you’ve never lived!”
This proves that you learn something new everyday. This means that we’re human, we’ve all got to make mistakes to become better. It’s how life works, we’re all humans not machines that do everything perfect, without flaws. We all make mistakes, but many give up. Those that don’t and fight till the end are the ones who become successful. Despite the failures, all of these people tried again and again and I guess such failures are one of the best lessons in their lives.