“An intangible and lively energy lifts the crown of the head.”

One of the things I often notice about my rolling partners in BJJ is that when they’re passing guard, they’re too easy to pick apart and attack because they let their spine bend by allowing their head to drop. As soon as this happens, I can attack their limbs easily because they’re suddenly not as strong. The spine is an integral part of the structure of our body, and when it’s not properly aligned, we’re weaker.
When we’re rolling in BJJ, and I’m in teacher mode, I’ll stop and point out when their head is down, and it’s often a kind of revelation to them. What I mean by “when their head is down” is that their head (and neck) is not in alignment with the rest of their spine. Once your head is aligned with your spine, you’re much stronger physically, without even trying. You’re also much more resistant to attacks from your partner. The game in BJJ then becomes about how you can break their spinal alignment while they try to keep theirs and break yours.
This takes you beyond the realm of just techniques and into the realm of principles. My BJJ book is certainly full of techniques, but I also tried to include a lot of text, especially in the intro pages for each section, about principles and strategy, too.
Having a background in tai chi, I think I’m more aware of spinal position than people who don’t have some sort of bodywork background before they start BJJ. In the 10 essentials by Yang Cheng-Fu as recorded by Chen Wei-Ming, it says, “An intangible and lively energy lifts the crown of the head. This refers to holding the head in vertical alignment in relationship to the body, with the spirit threaded to the top of the head. One must not use strength: using strength will stiffen the neck and inhibit the flow of qi and blood. One must have the conscious intent (yi) of an intangible, lively, and natural phenomenon. If not, then the vital energy (jingshen) will not be able to rise.”
Now there’s a lot of Chinese jargon in there that we can probably do without, and the way it’s written is not incredibly helpful. In BJJ, I usually just say “keep your head up” because that covers a multitude of sins, but what I’m really talking about is keeping your head in alignment with your spine.
If I’m teaching tai chi and I tell a student to keep their spine “vertical,” or lift “the crown of the head,” as it says in Yang Cheng-Fu’s recorded sayings, they almost immediately stiffen up straight like a soldier, holding their shoulders rigid and looking really uncomfortable. That’s not what you want in tai chi.
I think this stiffness is what Yang Cheng-Fu meant when he said in the next sentence of Chen Wei-Ming’s work: “One must not use strength: using strength will stiffen the neck and inhibit the flow of qi and blood.” A good tai chi spine is not a fixed position; it’s an alignment, and that means it’s an ever-changing position that adapts to your movement.
The general movement of your body in tai chi is always down. You are always relaxing and sinking down. That doesn’t mean you give up and slump on the floor like jelly; it means you just stop trying to hold yourself up all the time. You don’t really ‘do’ anything.
Relax the shoulders and just stand still for a bit in a wu chi posture. If you relax and allow it to happen, your head will naturally find the right spot where it sits in balance on top of your spine. The key is to stop trying to make it happen and let it happen. It wants to be there; you’ve just got to get yourself out of the way and allow it to happen. As it says in chapter 2 of the Tao Te Ching, “The sage acts by doing nothing.”
You’ll know when it feels right, and you can transfer that feeling to other situations: driving, working on a computer, and even, doing Brazilian Jiu-Jitsu.