On the practice of Zen

I make a remark to my teacher and he says, you should write this stuff down. You don’t have to tell me twice, for I love to write stuff down. So here is the first of what I expect will be a series of observations about the practice of Zen.
It is said that Zen is above all a practice, not a theory or philosophy. Experiential, not academic. And therefore one is supposed to do it rather than talk about it. And yet here I am talking about it, and planning to continue to do so. Oops.
OK, enough talk for now.