In Boethius' Consolation of Philosophy, He claims that although man seeks after happiness, he doesn't just want temporary happiness. Happiness is the highest good in mens eyes. Most things we do are done to make us happier.
This got me to thinking about the Wiki entry for The Denial of Death. Of course, I have my doubts as to whether such a system can directly encompass all of mankind's imperatives. Though if, as shall be posited, culture is a result then this certainly suggests that any culturally influenced thinking is a meta effect:
"The basic premise of The Denial of Death is that human civilization is ultimately an elaborate, symbolic defense mechanism against the knowledge of our mortality, which in turn acts as the emotional and intellectual response to our basic survival mechanism. Becker argues that a basic duality in human life exists between the physical world of objects and a symbolic world of human meaning. Thus, since humanity has a dualistic nature consisting of a physical self and a symbolic self, we are able to transcend the dilemma of mortality through heroism, a concept involving our symbolic halves. By embarking on what Becker refers to as an "immortality project" (or causa sui), in which a people create or become part of something which they feel will last forever; people feel they have "become" heroic and, henceforth, part of something eternal; something that will never die, compared to their physical body that will one day die. This, in turn, gives people the feeling that their lives have meaning, a purpose, significance in the grand scheme of things."
Boethius goes on to claim that God is the highest good. God is also the one being who is self-sufficient. God's essence is his existence and vice versa.
And what of concepts like God, or 'goodness?' I think, given the context of the above and what's to follow, your sentence is highly revealing: could one say that God's essence is self-sufficiency = immortality of existence? That would be hugely powerful to a species obsessed with its own mortality, since it portrays God as 'perfect.' Yet there are nasty implications:
"Becker argues that the conflict between immortality projects which contradict each other (particularly in religion) is the wellspring for the destruction and misery in our world caused by wars, bigotry, genocide, racism, nationalism, and so forth, since an immortality project which contradicts others indirectly suggests that the others are wrong."