A good amount of it comes from what I learned in the gym, universal life lessons like needing to put in the effort, come up with goals and a plan, stick to it, consistency, progressive efforts, needing all three legs of the stool (training, nutrition and rest), necessity of a certain amount of natural talent to get to the top, need to try new things if the old isn't working, need to rely on objective proof of gains, etc.
We can't all be Paul Dillett, but applying these took me further than 99% of folks who walk through a gym door.
Also never overcook your eggs past slightly runny or you won't be able to properly absorb the protein (broscience).