The conclusion outlines key points in the book. On a Kantian-Kierkegaardian account, thought experiments lead to presentations that justify calling a thought experiment an experience, though not an empirical or sensory one. Without a sensible object, we can nevertheless have givenness, or presence, but not existence. Cognition, for that reason, is not necessarily truthful: although object-directed, cognition on its own does not justify belief in any particular object’s existence. My conclusion that thought experiments provide cognition rather than knowledge echoes Michael Stuart’s claim that thought experiments increase understanding. Cognition is a common basis for knowledge in Kant, but it is not the same thing as knowledge. The conclusion also draws implications for how we understand faith (religious belief) in Kierkegaard and how thought experiments make sense of the complexity of reality.

Kierkegaard and Ørsted were not just contemporaries but personally knew each other. In this chapter, I argue that Kierkegaard probably learned the term Tankeexperiment from Ørsted. This chapter contextualizes Kierkegaard’s use of “imaginary construction” (Experiment) in his work as a whole, including his well-known uses of paradoxes. I will show how the core elements of Ørsted’s account – thought experiment as a method of variation, the need for free and active constitution, and the use of thought experiments for facilitating genuine thought – are echoed in Kierkegaard’s discussions. Along the way, I will describe some decisions on how to translate Experiment and Tankeexperiment that are unfortunate in some ways and fortuitous in others, as I will explain. In these ways, Kierkegaard indirectly takes up Kant’s proposal that “construction” (i.e., Experiment in Danish) is a means of achieving cognition.

Does the conception of worship – in expressing, as it does, a direct relationship with God – prevent an understanding of love for God as mediated by love for humans? Taking the latter to be an existential model of one’s relationship with God, in this chapter I answer in the negative to the above question by demonstrating the role that worship plays in such a model. To do so, I turn to Kierkegaard’s image of “resting transparently” in God. For Kierkegaard, this image represents what he perceives as the highest possible state of the believer’s relationship with God; a state that is achieved, according to Kierkegaard, when one becomes the self – the individual – that God intends one to be. And how does one become this self? By loving properly the neighbour (that is, another individual). The suggestion I develop in this chapter is that it is the worshipping of God – that is, by being in a state of respect and attendance to God’s will – that directs one in loving properly the neighbour. Hence, it is worship of God that paves the way to fully loving the neighbour and thus to fully loving God.

Hamlet is thrown into a state of uncertainty about the eternal. Indeed, his famed “delay” is a response to the thought of eternity. He is given “pause” by imagining “what dreams may come / When we have shuffled off this mortal coil”. The eternal is the “rub”. The chapter tackles this obscure rub by turning to Soren Kierkegaard, who references Hamlet’s famous soliloquy in his Philosophical Fragments. Resurrection, for Kierkegaard, is a movement through non-being to being. Negativity here plays a critical role. To be “born again”, the learner must “become[] nothing and yet … not [be] annihilated”. Hamlet’s struggle with the eternal opens him to an expansive view of humanity that goes beyond Claudius’s will to power or Laertes’s customary honour. It brings him to a new political vision, outside the violent and reductive dynastic politics of Denmark. Hamlet seeks what would seem impossible within revenge tragedy: the incalculable. The “eternal” is here used in an inclusive sense to show how the obscure but liberating thought of the timeless or untimely allows ideas of justice, charity, equality, and forgiveness to enter the play. The eternal suggests an imaginary perspective that negates our current preoccupations and political economies.

In this penultimate chapter, we take up the philosophical question of whether immortality is truly desirable, seeking to establish an important difference between existing for a finite and for an infinite stretch of time by introducing the following important consideration. If it remains possible for an event to occur, then even an extremely unlikely event is certain to occur, given infinite time. I shall suggest that this consideration leads to insuperable problems with the most popular scenarios currently being envisioned for achieving immortality by techno-scientific means. These problems, moreover, motivate us to think more deeply about death and thereby rethink the requirements of a genuinely meaningful human life. Drawing on Kierkegaard, Heidegger, and other existential thinkers, I suggest that human beings’ most abiding sources of meaningfulness come not from endlessly repeating certain profound experiences (which sometimes does wear out their appeal) but, instead, from our struggle to stay true to and so continue to creatively and responsibly disclose what such momentous events, often rare and singular, only partly reveal to us in the first place, as we often come to realize only in retrospect – much as Heidegger came only retrospectively to recognize and then spend his life creatively disclosing the seemingly inexhaustible ontological riches of that ambiguous “nothing” Being and Time first glimpsed in the momentous experience of existential death, but in a way that Heidegger only partly understood at that time.

Campbell and Freire rely on an understanding of symbolic action that is not merely instrumental but expressive. Rather than thinking that “the ends justify the means,” these authors consider which messages are conveyed by the means they use and ask whether these implicit messages are conducive to their ultimate ends. In Chapter 4, I analyze how Søren Kierkegaard uses this reasoning to develop an innovative approach to communication that avoids being co-opted by misleading philosophies. A direct, confrontational approach, Kierkegaard reasoned, only serves to confirm people in their illusions, therefore writers need to create opportunities for readers to examine their own lives. I explain the benefits of criticism that transcends “us versus them” binaries and therefore demands interlocutors re-evaluate their categories.

Judge William of Kierkegaard’s Either/Or claims that the Jutland Pastor’s sermon expresses exactly what he had tried to say in his letters. This is far from obvious to the reader, and I suggest we bypass the Judge, reading the sermon directly with A’s essays on unhappy love and tragedy. Like the sermon, Part I’s “Shadowgraphs” deals with the psychology of persons who have (apparently) been wronged by someone they love and the defenses they construct on the beloved’s behalf mimic classic theodicies. The Pastor’s “practical theodicy,” which consists in thinking of ourselves as the wrongdoers, can be applied to their predicament as well. Yet imagining what that would mean in an abusive interpersonal relationship shows how perilous the Pastor’s theodicy is, alienating us from our own ideas of good and bad, right and wrong. A’s treatment of tragedy offers an alternative. Recognizing that God (or the beloved) is indifferent or simply evil restores our moral-emotional integrity.

In this essay, we survey the history of Either/Or’s English language reception in order to contextualize the importance of the Critical Guide’s contribution to current discussions of Kierkegaard.

Chapter 6 is dedicated to examining an article by the Danish thinker, poet, and writer Poul Martin Møller, “Thoughts on the Possibility of Proofs of Human Immortality.” This article represents the most substantial treatment of nihilism in Danish philosophy. Møller reviews some of the then recent works in German literature about the controversial issue of whether Hegel’s philosophy contained a theory of immortality. He claims not only that Hegel’s philosophy does not have a theory of immortality, but also, absent such a theory, that it leads to nihilism. Like Jean Paul, Møller believes that the denial of immortality would render human existence impossible. Møller’s argumentative strategy is to use a reductio ad absurdum to refute the view that denies immortality. To begin, he assumes the correctness of this view, and then tries to explore further what precisely it would mean to hold it. Then from this he deduces negative consequences, which demonstrate that the view must be abandoned as contradictory. He follows this strategy through many different spheres: the life of the individual, social and political relations, art, philosophy, science, religion, and so on. He claims that all these spheres would collapse into nihilism if the belief in immortality is denied.

Jacobi’s influence on the founder of so-called existentialism, Søren Kierkegaard, has rarely been examined. This chapter explores Kierkegaard’s critical and somewhat polemical discussion of Jacobi’s notion of the “leap” in Concluding Unscientific Postscript, which not only shows that Kierkegaard was acquainted with Jacobi’s major work, Concerning the Doctrine of Spinoza but how it shaped Kierkegaard’s own particular development of the salto mortale.

The work of David Foster Wallace can be seen to critically renew ideas and concerns from existentialist philosophy and literature. Wallace repeatedly expressed his admiration of existentialist authors, and his fiction contains many explicit and implicit references to their writings. This chapter will provide an overview of the main themes and intertextual connections that Wallace’s work shares with the existentialists, such as a comparison with Sartre’s view of consciousness, Kierkegaard’s critique of irony, and Camus’s relation of meaningful existence to community; also, a brief comparative reading of the opening of Infinite Jest and Kafka’s “The Metamorphosis,” of “The Depressed Person” and Beauvoir’s “The Monologue,” and of “B.I. #20” and Dostoyevsky’s Notes from Underground. Overall, Wallace shares with these authors the conviction that philosophy and literature are partially overlapping activities, that some philosophical problems are best approached through literature, and that their works therefore blur the boundaries between these modes of writing.

The intellectual excitement of nineteenth-century Germany was reflected by the Romantic and Existential movements, although both had international aspects as well. Both movements were to some extent reactions against the dominant idealism of rationalism, coming primarily from Kant’s views on the active mind, constructing reality. Fichte, von Schelling, and Hegel explored the implication of Kant’s philosophy, with Hegel coming to dominate the age. Romanticism found its roots in Jean-Jacques Rousseau, and exerted tremendous influence in art, literature as well as philosophy, particularly in the first half of the nineteenth century. Recognizing the complexities of human experience, particularly in the dimensions of emotions, passions and desires, romanticism explored those aspects not readily explained by rational, intellectual processes. Existentialism was a direct reaction against rationalism and found initial expression in the nineteenth century by Kierkegaard, in Theology, and Dilthey, in psychology. Further, the Kantian notions of the strivings of the will and the unconscious were explored more fully by Schopenhauer and von Hartmann.

Some find the theology of an eternal punishment to be morally repugnant and theologically without warrant. But even if such is true of traditional doctrines of Hell, typified by those of Aquinas, it is not implausible to read Inferno as an “anti-narrative,” among other reasons because the literatures that write of a truly infernal mentality – for example,that of Dr. Faustus in Marlowe’s play – are vastly significant and their significance would not be lost even were Hell as an eternal condition impossible. For an infernal will is psychologically possible, even if the Hell willed is impossible as an existent state of affairs.