To say that one practices zazen in order to become an enlightened person is like saying one practices medicine to become a doctor. To practice medicine is to be a doctor. To practice zazen is to be enlightened. Enlightenment is not a static state of achievement; it is the active undertaking of the way exemplified in zazen.
— T. P. Kasulis, Zen Action, Zen Person (University Press of Hawaii, 1981), 78