Dylan Thomas, Christmas Letter (1933):
Walking, as we do, at right angles with the earth, we are prevented from looking, as much as we should, at the legendary sky above us and the only-a-little-blt-more-possible ground under us. We can only (without effort) look in front of us and around us; we can look only at things that are between the earth and sky, and are much in the position of a reader of books who can look only at the middles of pages and never (without effort) at the tops and bottoms. We see what we imagine to be a tree, but we see only a part of the tree; what the insects under the earth see when they look upwards at the tree, what the stars see when they look downwards at the tree, is left to our imagination. And perhaps the materialist can be called the man who believes in the part of the trees he sees, & the spiritualist a man who believes in a lot more of the tree than is within his sight. Think how much wiser we would be if it were possible for us to change our angles of perspective as regularly as we change our vests.