You need to put what you learn into practice and do it over and over again until it's a habit. I always say 'Seeing is not believing. Doing is believing.' There is a lot to learn about fitness nutrition and emotions but once you do you can master them instead of them mastering you.
I have a Ph.D. in cell biology. And that's really manual labor. I mean experimental science you do it with your hands. So it's very different. You're out there in a lab cleaning test tubes and it just wasn't that fascinating.