"I hear that Epicurus carried his theories in this very direction. The framework of things was to his mind a fortuitous and mechanical affair, without a Providence penetrating its operations; and, as a piece with this, he thought that human life was like a bubble, existing only as long as the breath within was held in by the enveloping substance , inasmuch as our body was a mere membrane, as it were, encompassing a breath; and that on the collapse of the inflation the imprisoned essence was extinguished. To him the visible was the limit of existence; he made our senses the only means of our apprehension of things; he completely closed the eyes of his soul, and was incapable of seeing anything in the intelligible and immaterial world, just as a man, who is imprisoned in a cabin whose walls and roof obstruct the view outside, remains without a glimpse of all the wonders of the sky.
Verily, everything in the universe that is seen to be an object of sense is as an earthen wall, forming in itself a barrier between the narrower souls and that intelligible world which is ready for their contemplation; and it is the earth and water and fire alone that such behold; whence comes each of these elements, in what and by what they are encompassed, such souls because of their narrowness cannot detect.
While the sight of a garment suggests to any one the weaver of it, and the thought of the shipwright comes at the sight of the ship, and the hand of the builder is brought to the mind of him who sees the building, these little souls gaze upon the world, but their eyes are blind to Him whom all this that we see around us makes manifest; and so they propound their clever and pungent doctrines about the soul’s evanishment;— body from elements, and elements from body, and, besides, the impossibility of the soul’s self-existence (if it is not to be one of these elements, or lodged in one); for if these opponents suppose that by virtue of the soul not being akin to the elements it is nowhere after death, they must propound, to begin with, the absence of the soul from the fleshly life as well, seeing that the body itself is nothing but a concourse of those elements; and so they must not tell us that the soul is to be found there either, independently vivifying their compound.
If it is not possible for the soul to exist after death, though the elements do, then, I say, according to this teaching our life as well is proved to be nothing else but death. But if on the other hand they do not make the existence of the soul now in the body a question for doubt, how can they maintain its evanishment when the body is resolved into its elements?
Then, secondly, they must employ an equal audacity against the God in this Nature too. For how can they assert that the intelligible and immaterial Unseen can be dissolved and diffused into the wet and the soft, as also into the hot and the dry, and so hold together the universe in existence through being, though not of a kindred nature with the things which it penetrates, yet not thereby incapable of so penetrating them? Let them, therefore, remove from their system the very Deity Who upholds the world."
G. Nyssa “On the Soul and the Resurrection.”
http://newadvent.org/fathers/2915.htm