I’ve read lots of great books in the last few years. And when I go back and look at my highlights, I almost always find something that makes me think, “Damn, I wish I could remember this when it matters.”
Learning a thing means more than just processing the logic of the thing. When I encounter something worth learning, I want to internalize it. I want to make it part of the machinery of me, the stuff that my brain uses to make decisions and reactions.
Just reading rarely accomplishes that. Nor does highlighting. If you want to truly absorb, you need to process the idea. Make time to reflect or apply or discuss it. Chew on it.