James put up a post a few days ago that I think is very worthy, as is AVI's comment there. I did not myself comment upon it at the time, but it dovetails with a work of philosophy I am rereading after several years. You should read both James and AVI before continuing with this one.
Hans Jonas was a German-born American philosopher, and his classic is
The Phenomenon of Life: Towards a Philosophical Biology. He
lived at the time of the second world war, in which he fought in both Italy and Germany. He wrote on Gnosticism and what is called existentialism; in fact, I think he derived a Neoplatonic metaphysics for himself without appearing to realize it.
The early parts of the book are already concerned with theology as well as biology, disposing of the "god of the mathematicians" as inadequate because such a god would have no reason to favor life over death and indeed no capacity to recognize that something was alive instead of dead.* He is very much concerned with the problem James and AVI are concerned with, in other words: the ability of the divine and the mortal to encounter each other, to conceptualize each other, to interact.
This problem has a long history in philosophy. It also works both ways. It is proven by Aquinas and others that humanity cannot fully comprehend the nature of God; in fact, here as elsewhere, they were following Avicenna's arguments, who was following Aristotle's. The question of how a god that exists on Aristotelian lines could even know us is a real problem in any theology that starts with Aristotle's concept of actuality versus potentiality; it is likewise in theologies (like Nicholas of Cusa's) that try to reason about the relationship by analogy to the infinite and the finite. (Nor is it clear that this is the right way to speak about a divine creator, whose work provides the ground for both the finite and all the infinities, who governs their relationships and makes possible their interactions in defiance of
Zeno's objections).
In his eleventh essay, Jonas -- who has come to view symbolic myth as 'the glass through which we see darkly' -- returns to the relationship between ourselves and the eternal, meaning God. Here he derives, apparently independently, both a Neoplatonic view of our relationship to the divine and of our "higher selves" that somehow exist in eternity but yet still in relationship with ourselves as finite and mortal creatures engaged in activity in time.
The bridge he comes up with is the now. Now doesn't seem to have finite boundaries: it isn't extended, with a beginning and an end. It just is, and it always is, but the now that was just now is not now any longer. When we decide and act, we do it in the now. This unextended time -- which is the only real time in the sense that it is the only time in which we can and do actually exist -- is like eternity in its neverending existence, and unlike the past and future that are extended and measurable. This is the ground where, he argues, mortal and divine meet.
From this he goes on to derive a positive ethics, by which I mean that his work is not existential after all: our essence comes first, and is derivable from what it means to be a living, conscious organism with freedom of action and this relationship with the divine. What we do in the now is written in eternity, perfects or mars our
noetic selves -- the image of us in the eternal -- and this gives us a real ethical duty to do right and not wrong.
Jonas' thinking will not fully satisfy anyone here. He believes he has disproven any sort of immortality for mortals beyond this capacity to write on eternity, or to exist as an idea in the mind of God. As a way of getting at the problem of how mortals and God can conceive of each other and interact, however, it is a thoughtful and novel approach.
* In this same essay Jonas explains something critical about the organism, that is about life, and why life is different and special. I have cited this before as a
fundamental proposition in philosophical objections to abortion, discussions of
agency, as well as in my
commentary on Plato's
Laws. It is one of the more important philosophical ideas I have encountered, and yet it emerges almost as an afterthought because what he is really interested in here is the right conception of God.