mikenz66 wrote: I would guess that "short" actually means "shallow" (not "short time") and, indeed, shallowness is what tends to happen as one becomes more concentrated, as you say.
this is my understanding as well. that its not long and short in length of time, but full or shallow, gross or subtle.
LonesomeYogurt wrote: should I try and go for short, subtle breaths? Does the scheme of the anapanasati tetrads imply that one should move from long to short breaths or simply that both styles should be known when and if they occur?
in my interpretation, "he discerns(knows,notes)" of the first 2 steps implies a more passive observation, vs the latter "he trains" which implies more input. again my interpretation is that until the breath is very shallow and subtle you just observe the breath mindfully.
i have found purposeful long breathing at the beginning to be conducive of settling down and getting mindfulness up... it's actually quite effective, maybe 10 breaths or so. purposefully constricting the breath doesn't really work for me, because the body isn't quite ready to breath so shallow. it sends up feelings anxiety and restlessness, re: lack of air.
“The unawakened mind tends to make war against the way things are. To follow a path with heart, we must understand the whole process of making war within ourselves and without, how it begins and how it ends."