people like to bring up the quote attributed to albert einstein "insanity is doing the same thing over and over again and expecting different results." and in a lot of cases that's true but I do think there's an important kind of meaning that can only be uncovered through repetition. A repetition that doesn't even show any noticeable differences for a long time.

I've been doing these drills for over two years now. Well, I was taught them over twenty years ago but when I wanted to get better at sprinting again I started doing them with intention and it's been interesting how over time they've become different. They feel different. It's kind of like a chant. You say the same words over and over and eventually they take on different meanings than they used to. With the drills I feel different muscles and the movement feels different. 

I would argue some things warrant a little bit of insanity.