The most important aspect of learning is that you never stop learning. Question even your knowledge. Without doing this we get to a point where we know everything.
Contrary to popular beliefs, knowing everything limits your ability to know what will become of what you know.
So don’t for a second waste time feeling inadequate because you don’t know something. Jump at it with eager anticipation of what’s going to come from it.
The objective of learning is to expand. We cannot expand if we have reached our limit.