Thomas Paine,
The Age of Reason/Part I — Chapter XIII - Comparison of Christianism with the Religious Ideas…
“ It is not difficult to gain some faint idea of the immensity of space in which this and all the other worlds are suspended, if we follow a progression of ideas. When we think of the size or dimensions of, a room, our ideas limit themselves to the walls, and there they stop. But when our eye, or our imagination darts into space, that is, when it looks upward into what we call the open air, we cannot conceive any walls or boundaries it can have; and if for the sake of resting our ideas we suppose a boundary, the question immediately renews itself, and asks, what is beyond that boundary? ”
