“The spiritual differs from the religious in being able to endure isolation. The rank of a spiritual person is proportionate to his strength for enduring isolation, whereas we religious people are constantly in need of ‘the others,’ the herd. We religious folks die, or despair, if we are not reassured by being in the assembly, of the same opinion as the congregation, and so on. But the Christianity of the New Testament is precisely related to the isolation of the spiritual man.”
Kierkegaard left the task of discovering the meaning of his works to the reader, because "the task must be made difficult, for only the difficult inspires the noble-hearted". Scholars have interpreted Kierkegaard variously as an existentialist, neo-orthodoxist, postmodernist, humanist, and individualist.
Crossing the boundaries of philosophy, theology, psychology, and literature, he is an influential figure in contemporary thought.