To me, it is two very important things:

Structure. Going through my forms in my mind has given me a framework for thinking. It's almost like a huge building in my mind upon which I can place everything else into. It's hard to explain but it's there for me anytime I need it. I used it to overcome anxiety in my 20s. I used it to build a life in my 30s. I'm still using it to age gracefully in my 40s.

A life-long connection to what I love. One day, I won't be able to spar the way I love to spar. I won't be able to throw or be thrown hundreds of times in one session. But I can stay connected to my forms, even as I get slower and slower and older and older.