I always say, "Do you really want to use the parts of your brain that make you empty your bowels and scream obscenities? Or do you want to leave those parts id

I always say, "Do you really want to use the parts of your brain that make you empty your bowels and scream obscenities? Or do you want to leave those parts idle most of the time?" It doesn't make much sense, but it makes at least as much sense as aspiring to use 100% of your brain.