This is a commonly recognized analogy.
In modern physics, they discovered that what initially appears solid is really mostly space, and looking even more closely, even the “particles” are really energy and also space. It’s all space.
When I look, I find the same in my own experience, as so many have before me, and so many do these days too. My field of experience is mostly space. Images, words, sensations, sounds, taste, smell all happen within space. Space with no findable end.
When I look more closely, even these – the images, words, sensations, sounds etc. – have space within them, and are space. It’s all space.
More accurately, it’s all awareness, and space, and appearances within and as – made up of – awareness and space.
It can be very helpful to notice this. Especially for appearances that at first appear quite solid, such as strong emotions, or physical pain, or contractions, or suffering, or seeking, or neediness, or a sense of me or I. Anything identified with will, at first, tend to appear quite solid. And when I look, I notice the space around it, and the space within it, and even the space (awareness) making it up.
Some people take this analogy quite literally and make it into something solid (!). I find it more helpful to see it as an analogy.
Even this analogy can be noticed as happening within space, with space within, and as space.
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Physics – initially appears solid, then revealed as space
Same w immediate experience, revealed as awareness /space
Even contractions, notice space within and around