But the fact is, that owing to our feebleness and sluggishness we are prevented from reaching the surface of the air: for if any man could arrive at the exterior limit, or take the wings of a bird and come to the top, then like a fish who puts his head out of the water and sees this world, he would see a world beyond; and, if the nature of man could sustain the sight, he would acknowledge that this other world was the place of the true heaven and the true light and the true earth. For
