Being an adult is willingly taking responsibility, and in some ways liking it. Whatever it is, I'll handle it somehow. It might not be perfect, the plan may change, and it may even ultimately fail, but it's still mine and I'll deal with it. I might do it myself, hire an expert, or ask for help. That doesn't matter.

The key is how we handle speedbumps and mistakes. A child throws up their hands, surrenders, and/or hands it over to someone else. Being an adult is less about knowing everything, but being able to see things through to the finish regardless of what comes your way.