 In The Concept of Dread, Søren Kierkegaard (1844) claims that nothingness wells up into our awareness through moods and emotions. Emotions are intentional states; they are directed toward something. If angered, I am angry at something. If amused, there is something I find amusing. Free floating anxiety is often cited as a counterexample. But Kierkegaard says that in this case the emotion is directed at nothingness.