Kierkegaard’s subject is not anxiety in the ordinary clinical sense, but anxiety as the peculiar mood of freedom confronting possibility. He begins from original sin and innocence, but quickly turns the discussion into a psychology of spirit: innocence is not moral purity already conscious of itself, but ignorance, and anxiety first appears as the unsettling presence of possibility before anything definite has been chosen. “The strongest, indeed, the most positive expression the Protestant Church uses for the presence of hereditary sin in man is precisely that he is born with concupiscentia…. All men begotten in a natural way are born with sin, i.e., without the fear of God, without trust in God, and with concupiscence.… Innocence is ignorance…. In this state there is peace and repose, but there is simultaneously something else that is not contention and strife, for there is indeed nothing against which to strive. What, then, is it? Nothing. But what effect does nothing have? It begets anxiety. This is the profound secret of innocence, that it is at the same time anxiety…. The actuality of the spirit constantly shows itself as a form that tempts its possibility but disappears as soon as it seeks to grasp for it, and it is a nothing that can only bring anxiety…. The concept of anxiety is almost never treated in psychology. Therefore, I must point out that it is altogether different from fear and similar concepts that refer to something definite, whereas anxiety is freedom’s actuality as the possibility of possibility…. Anxiety is a sympathetic antipathy and an antipathetic sympathy. One easily sees, I think, that this is a psychological determination in a sense entirely different from the concupiscentia [inordinate desire] of which we spoke…. The anxiety that is posited in innocence is in the first place no guilt, and in the second place it is no troublesome burden, no suffering that cannot be brought into harmony with the blessedness of innocence…. This anxiety belongs so essentially to the child that he cannot do without it. Though it causes him anxiety, it captivates him by its pleasing anxiousness [Beængstelse]. In all cultures where the childlike is preserved as the dreaming of the spirit, this anxiety is found. The more profound the anxiety, the more profound the culture.”
For Kierkegaard, anxiety is the atmosphere around the qualitative leap into sin. Psychology can describe the dizziness of freedom before the leap, but it cannot explain the leap itself; once freedom has fallen, guilt appears retrospectively as if everything has changed. “Anxiety means two things: the anxiety in which the individual posits sin by the qualitative leap, and the anxiety that entered in and enters in with sin, and that also, accordingly, enters quantitatively into the world every time and individual posits sin…. Hence anxiety is the dizziness of freedom, which emerges when the spirit wants to posit the synthesis and freedom looks down into its own possibility, laying hold of finiteness to support itself. Freedom succumbs in this dizziness. Further than this, psychology cannot and will not go. In that very moment everything is changed, and freedom, when it again rises, sees that it is guilty. Between these two moments lies the leap, which no science has explained and which no science can explain. He who becomes guilty in anxiety becomes as ambiguously guilty as it is possible to become…. In anxiety there is the selfish infinity of possibility, which does not tempt like a choice but ensnaringly disquiets [ængster] with its sweet anxiousness [Beængstelse]…. In each subsequent individual, anxiety is more reflective. This may be expressed by saying that the nothing that is the object of anxiety becomes, as it were, more and more a something.”
Kierkegaard then ties anxiety to time. The “moment” is not merely an instant in sequence, but the point at which eternity touches temporality; this matters because Adam’s fall is not simply a past event but a structure repeated in every subsequent individual. “Christianity, that which made all things new, is the fullness of time, but the fullness of time is the moment as the eternal, and yet this eternal is also the future and the past.” One of Kierkegaard’s central balancing acts is to preserve both inheritance and individual responsibility: every person begins “like Adam,” yet every person also sins only through his own qualitative leap. “Let us now consider Adam and also remember that every subsequent individual begins in the very same way, within the quantitative difference that is the consequence of the relationship of generation and the historical relationship. Thus the moment is there for Adam as well as for every subsequent individual…. The relation of freedom to guilt is anxiety, because freedom and guilt are still only possibilities.”
In Kierkegaard, unfreedom is not merely the absence of possibility; it is often a distorted relation to possibility, freedom, inwardness, and spirit. Superstition and unbelief are unfree because they evade or falsify the individual’s relation to freedom. “Both superstition and unbelief are forms of unfreedom. In superstition, objectivity is conceded to be a power—like that of Medusa’s head—which can petrify subjectivity, and unfreedom does not will that the spell be broken. Mockery is the highest and apparently the freest expression of unbelief. However, what mockery lacks is precisely certitude, and therefore it mocks. Yet how many a mocker’s existence, if only we could look into it, would recall the anxiety in which the demonic calls out: τί ἐμοὶ καὶ σοί [What have I to do with you]?”
For Kierkegaard, inwardness is a bellwether concept. The question is not whether one can produce an abstract proof of God, but whether the thought of God’s existence is allowed to become inwardly present for the individual’s freedom.“The thought of God’s existence [Tilværelse], when it is posited as such for the individual’s freedom, has an omnipresence that for the prudent individuality has something embarrassing about it, even though he does not wish to do anything evil. To live in a beautiful and intimate companionship with this conception truly requires inwardness, and it is a much greater feat than that of being a model husband. How depressed such an individuality may feel when he hears a naive and simple man talk about the existence of God. The demonstration of the existence of God is something with which one learnedly and metaphysically occupies oneself only on occasion, but the thought of God forces itself upon a man on every occasion. What is it that such an individuality lacks? Inwardness.”
As the book develops, the demonic appears as anxious evasion: the refusal to face eternity, freedom, guilt, and possibility directly. But Kierkegaard’s final twist is that anxiety is not merely a danger; rightly undergone, it becomes educative, because it strips away finite evasions and teaches the individual the weight of possibility. “Men are not willing to think eternity earnestly but are anxious about it, and anxiety can contrive a hundred evasions. And this is precisely the demonic…. I will say that this is an adventure that every human being must go through—to learn to be anxious in order that he may not perish either by never having been in anxiety or by succumbing in anxiety. Whoever has learned to be anxious in the right way has learned the ultimate…. The more profoundly he is in anxiety, the greater is the man—yet not in the sense usually understood, in which anxiety is about something external, about something outside a person, but in the sense that he himself produces the anxiety…. Only in this sense can the words be understood when it is said of Christ that he was anxious unto death…. Anxiety is freedom’s possibility, and only such anxiety is through faith absolutely educative, because it consumes all finite ends and discovers all their deceptiveness…. Whoever is educated by anxiety is educated by possibility, and only he who is educated by possibility is educated according to his infinitude…. In possibility all things are equally possible, and whoever has truly been brought up by possibility has grasped the terrible as well as the joyful…. When he has thoroughly learned that every anxiety about which he was anxious came upon him in the next moment—he will give actuality another explanation, he will praise actuality, and even when it rests heavily upon him, he will remember that it nevertheless is far, far lighter than possibility was…. In order that an individual may thus be educated absolutely and infinitely by the possibility, he must be honest toward possibility and have faith…. When the discoveries of possibility are honestly administered, possibility will discover all the finitudes, but it will idealize them in the form of infinity and in anxiety overwhelm the individual until he again overcomes them.”
Finally, Kierkegaard affirms the role of faith and reiterates its role in the concept of the infinite. Faith is the qualitative leap that comes when the self, having been brought through possibility to the absolute, rests in the absolute. Faith is anticipating eternity in time — and what anxiety has done is empty the self of every finite anchor so that this resting becomes possible. Anxiety becomes saving only through faith: it educates the self in possibility, reveals guilt more radically than any external court could, and brings the individual to rest not in self-management but in providence and atonement. Anxiety is therefore ambiguous: it is neither guilt itself nor mere innocence, neither fear of a definite object nor freedom already actualized, but the trembling middle state in which possibility presses upon spirit. “With the help of faith, anxiety brings up the individuality to rest in providence. So it is also in relation to guilt, which is the second thing anxiety discovers. Whoever learns to know his guilt only from the finite is lost in the finite, and finitely the question of whether a man is guilty cannot be determined except in an external, juridical, and most imperfect sense…. From finitude one can learn much, but not how to be anxious, except in a very mediocre and depraved sense. On the other hand, whoever has truly learned how to be anxious will dance when the anxieties of finitude strike up the music and when the apprentices of finitude lose their minds and courage…. Therefore he who in relation to guilt is educated by anxiety will rest only in the Atonement.”