. "S\u00F8ren Kierkegaard and Friedrich Nietzsche"@en . . . . . . "Most researchers believe that Friedrich Nietzsche (1844\u20131900) knew little of the 19th century philosopher S\u00F8ren Kierkegaard (1813\u20131855). Georg Brandes, a Danish philosopher, wrote to Nietzsche in 1888 asking him to study the works of Kierkegaard, to which Nietzsche replied that he would. Nietzsche seems to have been unable to undertake this task before his mental collapse in 1889. Recent research, however, suggests that Nietzsche was exposed to the works of Kierkegaard, through secondary literature. Aside from Brandes, Nietzsche owned and read a copy of Hans Lassen Martensen\u2019s Christliche Ethik (1873) in which Martensen extensively quoted and wrote about Kierkegaard\u2019s individualism in ethics and religion. Nietzsche also read Harald H\u00F8ffding\u2019s Psychologie in Umrissen auf Grundlage der Erfahrung (ed. 1887) which expounded and critiqued Kierkegaard\u2019s psychology. Thomas Brobjer believes one of the works Nietzsche wrote about Kierkegaard is in Morgenr\u00F6the, which was partly written in response to Martensen's work. In one of the passages, Nietzsche wrote: Those moralists, on the other hand, who, following in the footsteps of Socrates, offer the individual a morality of self-control and temperance as a means to his own advantage, as his personal key to happiness, are the exceptions. Brobjer believes Kierkegaard is one of \"those moralists\". Both Kierkegaard and Nietzsche, considered precursors to existentialism (or existentialists themselves), criticized the rational, idealistic, and systematic structures of philosophy. Both philosophers wrote in a fairly unsystematic way and with similar literary style. They attacked what they saw as the detrimental effect of Christendom on the population. Kierkegaard and Nietzsche condemned Christian churches for perverting Christianity, but they differ in their view of whether religion can continue to play an important part in an individual's life. Kierkegaard believed that Christian belief and faith is a much more individualistic and personal experience, filled with dread and joy, than is afforded by the comfortable social gathering of Christendom, while Nietzsche believed Christians were attached to Christianity (which Nietzsche saw as a decadent religion) in order to compensate for their individual weaknesses."@en . . "Most researchers believe that Friedrich Nietzsche (1844\u20131900) knew little of the 19th century philosopher S\u00F8ren Kierkegaard (1813\u20131855). Georg Brandes, a Danish philosopher, wrote to Nietzsche in 1888 asking him to study the works of Kierkegaard, to which Nietzsche replied that he would. Nietzsche seems to have been unable to undertake this task before his mental collapse in 1889."@en . .