And as condition, in his eyes, had the seeming of form, so he entered into what had been wall to him and bathed in the substance that composed it.
It was bewildering.

He was sprawling through solidity.

And ever the light grew brighter.

Fear urged him to go back, but growth drove him on.
Suddenly he found himself at the mouth of the cave.

The wall, inside which he had thought himself, as suddenly leaped back before him to an immeasurable distance.