When you’re trying to answer new questions, that’s a good sign.
When you’re dealing with new problems, that’s a good sign.
Growth happens when you’re spending your time doing things at the edge of your abilities. Answering new questions and solving new problems are a good sign that you’re working at the edge of your ability.
But that doesn’t make it easy.
PS: The best way I’ve found for answering new questions and solving new problems? Surrounding myself with other smart people who have done it before.