I find it interesting to compare two stories of the separation of heaven and earth:
First is the familiar story from Hesiod's Theogeny, concerning Ouranos, Gaia, and Kronos. Ouranos, father sky, and Gaia, mother earth, are separated when Kronos castrates Ouranos with a scythe he received from Gaia. Thus begins Time according to some who associate Kronos with Chronos, though this is disputed.
Second is the Maori story, from New Zealand, of Rangi, father sky, and Papa, mother earth, separated by their son, Tane. Tane separates them by placing his head upon earth and feet upon sky, then pushing them apart and becoming the first tree. In this way, Tane, the tree, separates heaven and earth and holds them together at the same time.
It is meaningful that in the first, separation is caused by violence - cutting and castration, whereas in the second the separation is accomplished in a more gentle, and conciliatory manner. This certainly presents inherently different cosmologies. It is worth noting that trees play a role in creating an atmosphere and thereby separating earth from sky (space) making life possible. It is also worth considering how the notion of psychic separation from spirit and matter creates an alienating sense of self moving through time. Without a sense of time, narrative could not exist.
But the thing I think about most, lately, is how Tane becomes Tree by putting his head upon his mother's breast and feet against his father's chest, stretching upwards in a deep-rooted head stand. The storyteller could have had Tane simply stand on earth and push on sky like Kronos' younger brother, Atlas, holding up the sky. But the story has the head of trees in the earth. As I look out at the trees, I imagine them that way. The visible part of trees is only half the whole, waist to toes if you will. The head and arms are below ground.
If the Western Mind, inheritor of the Greek cosmology, is alienated from earth and sky, perhaps we would do well to take an idea from the Maori and turn our heads around.