I'm afraid "without zazen there is no Zen" is false. I recently experienced kensho after four years of "practice," little of which was zazen. Having had this initial realization, I can see why zazen might be a great help to someone, but zazen is not a prerequisite. Come to think of it, I can also see how zazen might be a hindrance to some, as it could keep the uninitiated preoccupied with willing some state of mind or other, when in fact the point is to *forgo* engagement of the mind. Reality flows, flow with reality.