If a thought comes to mind while we are wide awake and we chase after it, this is called thinking. And, if a thought comes to mind when we are sleepy and we drift after it, we are simply chasing after a dream in our sleep. Or we may be nodding away and at the same time thinking that although we are sleepy we are holding out and sitting as solidly as ever. What we are really doing here is just dreaming about doing zazen.
