Teaching is a great way to learn.
When we commit to the act of transferring knowledge, we explore the topic again. We question what we know, looking for proof that validates (or not) what we know. During this exploration, we get updated from the latest insights and different points of view.
With the knowledge obtained, we update our stance and synthesize it in a useful way.
Next time you want to learn something, put yourself in a situation when you have to teach. Let the domino effect do its thing.