That’s it, really.
Even the strongest contraction happens within boundless space.
If I don’t notice that, attention may get absorbed into the contraction itself and the stories creating and reacting to it. I may experience my world becoming hard and small, and experience and act from that hard and small world.
When I do notice the boundless space it’s all happening within and as, something shifts. It’s all allowed to be as it is, and it feels less small, less contracted, perhaps even less real and solid. The qualities of the space I am noticing becomes my experience, and what I am. It always was and is what I am, and by noticing it there is a shift.
It’s pretty obvious. When all I notice is my contraction and contraction-inducing stories, that’s how I experience myself and my world. When I notice the boundless space it’s all happening within and as, that’s how I experience myself and my world.
Why is it boundless? How can I explore the boundlessness? The easiest is to notice that any boundary is imagined, it’s created by my own images and perhaps words, sometimes associated with sensations, and these too happen within space. Any boundary happens within space, so the space itself is boundless.