From Kierkegaard's 'Sickness Unto Death'

Currently reading "Basic Writings of Existentialism," I am in the mist of a work called "Sickness Unto Death" by Danish thinker Søren Kierkegaard, who, somewhat ironically, is known as the father of existentialism, even though many of his fellow existentialists, Sartre, Nietzsche, Camus, Heidegger and others, were less conspicuously Christian or religious. Some, like Nietzsche, in their writings, leaned heavily toward being hostile regarding religion or the idea of a god, in fact.

That said, if anyone might be interested in exploring existentialism further and wants to remain within the Christian worldview, Kierkegaard would be an excellent choice. The following is the conclusion of the chapter titled "The Universality of This Sickness (Despair)." By "despair," Kierkegaard means humankind's supposed situation in original sin or spiritual "sickness." I found this to be a particularly stirring and elegant summation of this argument.

Ah, so much is said about human want and misery -- I seek to understand it, I have also had some acquaintance with it at close range; so much is said about wasted lives -- but only that man’s life is wasted who lived on, so deceived by the joys of life or by its sorrows that he never became eternally and decisively conscious of himself as spirit, as self, or (what is the same thing) never became aware and in the deepest sense received an impression of the fact that there is a God, and that he, he himself, his self, exists before this God, which gain of infinity is never attained except through despair. And, oh, this misery, that so many live on and are defrauded of this most blessed of all thoughts; this misery, that people employ themselves about everything else, or, as for the masses of men, that people employ them about everything else, utilize them to generate the power for the theater of life, but never remind them of their blessedness; that they heap them in a mass and defraud them, instead of splitting them apart so that they might gain the highest thing, the only thing worth living for, and enough to live in for an eternity -- it seems to me that I could weep for an eternity over the fact that such misery exists! And, oh, to my thinking this is one expression the more of the dreadfulness of this most dreadful sickness and misery, namely, its hiddenness -- not only that he who suffers from it may wish to hide it and may be able to do so, to the effect that it can so dwell in a man that no one, no one whatever discovers it; no, rather that it can be so hidden in a man that he himself does not know it! And, oh, when the hour-glass has run out, the hourglass of time, when the noise of worldliness is silenced, and the restless or the ineffectual busyness comes to an end, when everything is still about thee as it is in eternity -- whether thou wast man or woman, rich or poor, dependent or independent, fortunate or unfortunate, whether thou didst bear the splendor of the crown in a lofty station, or didst bear only the labor and heat of the day in an inconspicuous lot; whether thy name shall be remembered as long as the world stands (and so was remembered as long as the world stood), or without a name thou didst cohere as nameless with the countless multitude; whether the glory which surrounded thee surpassed all human description, or the judgment passed upon thee was the most severe and dishonoring human judgement can pass -- eternity asks of thee and of every individual among these million millions only one question, whether thou hast lived in despair or not, whether thou wast in despair in such a way that thou didst not know thou wast in despair, or in such a way that thou didst hiddenly carry this sickness in thine inward parts as thy gnawing secret, carry it under thy heart as the fruit of a sinful love, or in such a way that thou, a horror to others, didst rave in despair. And if so, if thou hast lived in despair (whether for the rest thou didst win or lose), then for thee all is lost, eternity knows thee not, it never knew thee, or (even more dreadful) it knows thee as thou art known, it puts thee under arrest by thyself in despair.

Here's the entire chapter for those interested.