A lot of people here are going to talk negatives and prioritization and purpose, but I personally also want to be practically omniscient, and you should strive for it too. You need strategies if you want to know a lot. Certainly focused things like classes and intensive study are necessary from time to time (and especially early in life), but we can't do that our whole lives, nor do we want to. What we need is to dev…
Do you want to be "book smart" and only know a lot about what someone else thinks and tells you, or actually learn something yourself and gain the intuition and detailed understanding that you get from forming your own knowledge? You can read books till the cows come home, but don't expect to become an expert from reading alone. I can't imagine anyone on their deathbed wishing they'd spent more time reading on the to…
I'm a software engineer posting on Hacker news. I know how to learn a skill.
This is something else, that you can have, if you read lots of books and learn more languages.
Becoming smart is, in part, about being exposed to lots of others thoughts, and lots of facts, and discussing those things and thinking through them yourself.