Nighttime and daytime are not different. The same thing is sometimes called nighttime, sometimes called daytime. They are one thing. Zazen practice and everyday activity are one thing. We call zazen everyday life, and everyday life zazen. But usually we think, “Now zazen is over, and we will go about our everyday activity.” But this is not the right understanding. They are the same thing. We have nowhere to escape. So in activity there should be calmness, and in calmness there should be activity. Calmness and activity are not different.
