In my last couple of posts, I wrote about "non-thinking" and sitting in an upright posture. This post relates to both of those. It's about a Japanese expression shin-jin-datsu-raku which the Zen monk Dogen used to describe what happens when we practice zazen. Dogen first heard the expression from his teacher, Tendo Nyojo, when he visited China from Japan in the 13th century to meet a true teacher.
The usual English translation for shin-jin-datsu-raku is "dropping body and mind" or "body and mind drop off". Here's the meaning of the four Chinese characters (身心脱落) that make up shin-jin-datsu-raku:
shin (身) means "body"
jin (心) means "mind"
datsu (脱) means "shed"
raku (落) means "drop" or "let fall"
So shin-jin-datsu-raku literally means "body & mind are shed and fall". But the characters for datsu and raku go together, and mean "drop off". So shin-jin-datsu-raku is usually translated something like "body & mind drop off".
"Body & mind drop off" is a confusing expression. It's easy to think it means that when you do zazen your body and mind actually drop off and all that's left is some kind of "spirit". But that doesn't happen.
So what does "body & mind drop off" mean? My teacher Gudo Nishijima interprets it as meaning that when we do zazen our mind gets less active and our perception of our body sensations gets less active. So we're not actively considering things or perceiving things. Of course, we're sitting there with our eyes are open and we can see the wall and hear sounds, but we're not thinking about them. Our consciousness is clear and quiet. Master Dogen described this as "body & mind drop off".
One thing about "body & mind drop off" is that it happens naturally, without us having control over it. We do zazen and try to sit upright. When we're sitting, our thinking might quieten down and our sense perceptions might quieten down, and then we feel like our consciousness is clearer. We might not reach a point where our mind is completely blank and our senses have gone completely quiet, but we can feel like they're quieter than when we first sat down.
Nishijima uses the idea of +/- zero to describe what happens when we do zazen. When we first sit down our mind might be really active or we might be really conscious of our senses. And we can swing back and forth between a state where we're thinking a lot (a "+" state) and a state where we're really conscious of our senses (a "-" state). That can continue throughout our zazen. But at some point, our thoughts may slow down and our bodily sensations may ease off. At that time, there's not too much activity in our head and we're just sitting there. That's the kind of "zero" state.
Zazen is not about thinking. Zazen is a kind of action. You sit on a cushion and try to keep your back straight. It's a very simple action and a very pure action. There's not an awful lot going on when you're doing it. You're just sitting there. But you can notice your thoughts and notice your posture too. And after a while that consciousness of thoughts and of posture subsides and you sit there without much going on in your head. And when you get up from zazen you might feel a bit different from when you started. People who do zazen refer to that feeling as "balanced". It's a nice feeling. And if you practice zazen regularly, that feeling might stay with you for a good part of the day.
But you don't have to take my word for it. If you do zazen for a while you'll see for yourself.