I believe that you could call this epiphany a change of perception. To his kid, the world is a challenge, and the opinion of others (or the perception of opinions of others), ego, reputation don't matter. Failing, in this new light, does not matter; it is simply the fastest way to discover one less way to try the next time.

Say, for instance, public speaking. We are all familiar with the feeling of fear when speaking in front of a group. However, going on stage and trying different stuff, is (quickly) going to get you better at speaking. I could watch a million YouTube movies about public speaking, but actually trying and failing is the shortest way to getting actually better at it. Only when analyzing what could go better, watching those movies can provide valuable input for a next try (asking an expert is even better). The thing is: negativity and fear (of criticism) often gets the better of us, way before we fail enough to succeed. This often when we hear: "I'm just not a natural born speaker" and stop trying. - Guess what, almost no-one is. Just don't be afraid to fail.