In order not to leave any traces, when you do something, you should do it with your whole body and mind; you should be concentrated on what you do. You should do it completely, like a good bonfire. You should not be a smoky fire. You should burn yourself completely. If you do not burn yourself completely, a trace of yourself will be left in what you do. You will have something remaining which is not completely burned out. Zen activity is activity which is completely burned out, with nothing remaining but ashes. This is the goal of our practice. That is what Dogen meant when he said, “Ashes do not come back to firewood.” Ash is ash. Ash should be completely ash. The firewood should be firewood. When this kind of activity takes place, one activity covers everything.

But Buddha was not interested in the elements comprising human beings, nor in metaphysical theories of existence. He was more concerned about how he himself existed in this moment.

We should find perfect existence through imperfect existence. The basic teaching of Buddhism is the teaching of transiency, change. That everything changes is the basic truth of each existence. When we realize the everlasting truth of “everything changes” and find our composure in it, we find ourselves in Nirvana.