How focused can you get?

It is too easy to get obsessed with how long you study, but that's the wrong way to do it. You need to be concerned about how deep you can get.

How focused can you get? That's how you should be measuring your study.

There is an upper bar on how long you can study each day. You should be prioritizing how deep you can get.

The depth of how you study is much more important than how long you study.