Personally, I got humbled early on when I realized that I wouldn't be able to read all the interesting books in the world. I wouldn't even be able to keep up with just the new interesting books being published. A very sad day, that was.
It was a simple matter of reading (and not quite understanding) a few real books aimed at researchers to see that some people were far brighter than me. Just like some were far better at drawing or playing football or high jumping. I count on someone (or many someones) being better than me at absolutely every single thing that I might be good at. Hopefully, the talent profile I have will be good enough anyway, especially if I work hard and avoid winner-takes-all areas.
(It did take a long time to learn how to apply myself, though, after so many years of enforced boredom.)