There is always going to be someone better than you. Get used to it! If you're as good as some of the masters that I've learned from, you wouldn't be reading this.
The philosophy behind Taijiquan is Daoism (Taoism in Wade-Giles script—it has a 'd' sound in Chinese pronunciation), which has been largely misinterpreted in the West.
It's about the natural order of the universe and your place in it (and the universe is a big place!).
We need to apply all our knowledge of science to get our heads around that.
Try reading Fritjof Kapra's Tao and the Art of Physics.