Ed. note: this lays a foundation for understanding the difference between immaturity and maturity, between immature and mature love.
“The best expression of the aesthetic existence comes down to saying that it lies in the moment” – KIERKEGAARD, S., L’Equilibrie, p. 207.
The here-and-now is a big deal in the postmodern mind, by necessity, since personal experience is the final measure of truth, and hence reality. This undoubtedly explains the mass appeal and rapid dissemination of this world view in American culture, so absorbed we are in the here-and-now. Industries thrive on the fixation with immediacy: fast foods, convenience stores, fast cars and so forth. Everything depends on the moment, and it’s an presumed moral imperative: “Carpe diem!” as the Latin poet said long ago.** It’s an understandable fixation if death means the end of it all, as Paul says:

If there is no resurrection, “Let’s feast and drink, for tomorrow we die!” 1 Corinthians 15:32 (NLT)
What’s wrong with here-and-now anyway? Didn’t Jesus Christ extol it?
“So don’t worry about tomorrow, for tomorrow will bring its own worries. Today’s trouble is enough for today.” Matthew 6:34 (NLT)
The problem with here-and-now postmodern living is its naked immaturity. When Christ says “don’t worry about tomorrow,” he’s talking specifically about useless anxiety. The postmodernist, however, dumps all meaning and existence into the here-and-now.
“Everything good is instinct – and consequently easy and free.” – Nietzsche
Nietzsche fits into the American psyche well, although he was German, and although writing more than 100 years ago, modern Americans would love this articulation of lower-brainstem life:
“The use of reason to control instincts is a fatal flaw. Nietzsche calls this decadent.” – Kierkegaard, Dostoevsky and Nietzsche
They say Nietzsche went insane from an STD, but it was probably well underway by that time. To label self-control as “decadent” is a stretch. Nietzsche is a Christian-hater, of course, so his rants are often geared to shock the traditional church.
More than 100 years ago Dostoevsky also captured the future American revulsion with the biblical world view:
“If one has grasped the blasphemousness of such a rebellion against life as has, in Christian morality, become virtually sacrosanct, one has fortunately therewith grasped something else as well; the uselessness, illusoriness, absurdity, falsity of such a rebellion.” – Dostoevsky
The “rebellion” label is well-deserved and worn with pride, especially by those New Testament characters like Christ and Paul, and they were also called absurd, useless and liars by the elitists of their time. Dostoevsky’s slander fits the traditional Kosmos mold from long ago, but his amorality also typifies the postmodern Kosmos today. This here-and-now lifestyle spans the existence of man. It is so ancient its foundational tenants are recorded in the first book ever written in the Bible, around 4,000 years ago:
If you sin, how does that affect God? Even if you sin again and again, what effect will it have on him? If you are good, is this some great gift to him? What could you possibly give him? Job 35:6-7 (NLT)
Therein lies the true cause for the grapes of wrath*: human indifference towards God. Once God is eliminated by whatever means, the road opens for moral drift and, ultimately, the fixation with here-and-now. Some do it by feigning God’s indifference the way all manmade religions do, either by setting him aloof and transcendent as in Job 35, or casting Him as a non-person in the tradition of eastern speculation. Others deny God’s existence altogether, as with modernists. Still others revile His world view, as with the above proto-postmodernists. The result is the same: only I am concerned with my here-and-now, and there my concern must and will lie.
* Grapes of Wrath: the title of John Steinbeck famous 1939 novel, which he lifted from Julia Ward Howe’s famous 1861
Battle Hymn of the Republic, which in turn was lifted from the Bible: “So the angel swung his sickle over the earth and loaded the grapes into the great winepress of God’s wrath.”
Revelation 14:19(NLT) Additional references:
Kierkegaard’s Aesthetic Realm of Existence,
Kierkegaard, Dostoevsky and Nietzsche.