This just over the transom:

There's a question I've been pondering for some time that I'd like your opinion on if you're willing. I've always been fascinated by people who have been occupied and consumed by the things of the world- power, money, fame, sex, etc. For example, I just finished watching a documentary about Ronnie Coleman, one of, if not the most, famous body builders of all time. For him, body building was his life, he won 8 Mr. Olympia titles. Now, in his old age, he has horrible back issues from all his training and gets around on crutches. Yet he says he regrets nothing. There are countless examples of people who spend their entire lives devoted to the material and transient world, seemingly in complete ignorance of the Divine and the eternal.

As a Christian, I find it hard to understand how this is possible. If God does exist, and there is an eternal realm as Plato thought, then how can someone be 'satisfied' with a life that was devoted to the temporal and earthly realm? Is it that such persons are simply ignorant? Or perhaps such persons are willfully ignorant? As a person who has always had a religious disposition, like yourself, I find it hard to understand and sympathize with people who do not. 

Any thoughts you might have would be much appreciated. Thanks so much for your time. 

How can so many live for the goods of this life alone?

The short answer is that they don't take seriously the idea that there is any other life and any other goods.  It is not just that they don't believe that there is an eternal realm, Unseen Order, divine milieu, or whatever you want to call it.  It is not even an issue for them.  The question is idle and otiose: it simply does not arise for them in any existentially arresting form.  Questions about God and the soul are simply dismissed in the way almost all adults dismiss questions about Santa Claus.

But WHY don't they take Unseen Things seriously? 

It comes down to what could be called one's sense of reality.  For the worldling, the transient things of this world are as real as it gets, and all else is unreal. The impermanence of things and the brevity of life do not impress or shock him as they do someone with a religious sensibility.  The worldling doesn't take then as indices of unreality as a Platonist would. If you point out the brevity of life to a worldling he might give a speech like the following:

Precisely because life is short, one must not waste it.  Brevity does not show lack of reality or value, pace Plato and his latter-day acolytes such as Simone Weil, but how real and valuable life is. This life is as real as it gets.  It is precious precisely because it is short. Make the most of it because there is not much of it, but what there is of it is enough for those who are fortunate, who live well, and who do not die too soon. Don't waste your life on religious illusions!

The attitude here is that life is short but long enough and valuable enough, at least for some of us.  One should make friends with finitude enjoying what one has and not looking beyond to what is merely imagined.  Near the beginning of the The Myth of Sisyphus, Albert Camus quotes Pindar, "O my soul, do not aspire to immortal life, but exhaust the limits of the possible." (Pythian, iii)

A frat boy might put it like this:

Ashes to ashes
Dust to dust
Life is short
So party we must.

Or in the words of a 1970 beer commercial:

You only go around once in life
So you have to grab for all the gusto you can.

This attitude of the worldling is possible because it is actual and indeed widespread more so now than ever before in history, in good measure because of our technology that extends life and makes it vastly  more endurable than in previous centuries. Our 24-7, 365(6) connectivity also practically insures that we will remain trapped within the sphere of immanence and be unable to 'pick up any signals' from beyond the human horizon. 

The worldling's attitude is a matter of sensibility and it is difficult to argue with anyone's sensibility. I cannot argue you out of your sense of reality. Arguments come too late for that.  In fact, arguments are often little more than articulations on the logical plane  of a sensibility deep in the soul that was already in place before one attained explicit logical skills.

Is the worldling ignorant?

My reader and I would say he is. But how prove it either to him or to us? Can one PROVE that God and the soul are real? No. At best one can give a number of plausible arguments for these 'objects' and a number of plausible arguments against metaphysical naturalism. But at the end of the day one is going to have to invoke certain mystical vouchsafings, intimations, glimpses, revelations, teachings of some magisterium deemed finally authoritative, all of which are easily hauled before the bench of reason to have their veridicality questioned. In the end, a leap of faith. You will have to decide what to believe and how to live.

Suppose I take the 'bite of conscience' as pointing to the existence of a Supreme Moral Authority of a personal nature.  I could make a very strong case. But would it be rationally compelling? No.  Could I ever be objectively certain that no naturalistic explanation could account adequately for the deliverances of conscience?  I don't think so.

Is the worldling morally culpable for his ignorance?

Some might be, but in general, he is not.  Pace St. Paul at Romans 1: 18-20, I don't find unbelief to be morally culpable.  It is neither evident that God exists nor evident that he does not exist.