Okay. So I stayed out of this as long as I could. But I guess I'm pretty weak willed. So here goes. I think of "being grounded" as almost, but not quite entirely, a consequence of "arriving". When I take a step, I try to really arrive, without actually stopping, on my axis prior to taking the next step. Similarly, I expect my partner to push to her axis, but no further, on each step so that she too "arrives." One result is a strong, rolling, "tango walk" which is not just a shuffle. Another is that I feel where my partner is, and she feels where I am at, on each and every step. I think of allowing my partner to feel the ground through my body, and I feel the ground through hers. Grounded. It's not about me, it's about us. Just MHO.