Søren Aabye Kierkegaard (5 May 1813 –11 November 1855) was a Danish philosopher, theologian and religious author. He was a critic of idealist intellectuals and philosophers of his time, such as Georg Wilhelm Friedrich Hegel, Friedrich Wilhelm Joseph Schelling and Karl Wilhelm Friedrich Schlegel. He was also critical of the state and practice of Christianity, primarily that of the Church of Denmark. He is widely considered to be the first existentialist philosopher.
Much of his philosophical work deals with the issues of how one lives as a "single individual", giving priority to concrete human reality over abstract thinking, and highlighting the importance of personal choice and commitment.
His theological work focuses on Christian ethics, on the institution of the Church, and on the differences between purely objectiveproofs of Christianity. He wrote of the individual's subjective relationship to Jesus Christ, the God-Man, which came through faith.
His psychological work explored the emotions and feelings of individuals when faced with life choices. His thinking was influenced by Socrates and the Socratic method.
Kierkegaard's early work was written under various pseudonyms whom he used to present distinctive viewpoints and interact with each other in complex dialogue. He assigned pseudonyms to explore particular viewpoints in-depth, which required several books in some instances, while Kierkegaard, openly or under another pseudonym, critiqued that position. He wrote manyUpbuilding Discourses under his own name and dedicated them to the "single individual" who might want to discover the meaning of his works. Notably, he wrote:
"Science and scholarship want to teach that becoming objective is the way. Christianity teaches that the way is to become subjective, to become a subject."
The scientist can learn about the world by observation but Kierkegaard emphatically denied that observation could reveal the inner workings of the spiritual world. In 1847 Kierkegaard described his own view of the single individual:
God is not like a human being; it is not important for God to have visible evidence so that he can see if his cause has been victorious or not; he sees in secret just as well. Moreover, it is so far from being the case that you should help God to learn anew that it is rather he who will help you to learn anew, so that you are weaned from the worldly point of view that insists on visible evidence. (...) A decision in the external sphere is what Christianity does not want; (...) rather it wants to test the individual’s faith."