Søren Kierkegaard was a Christian author who was against applying the ideas of the Scientific Enlightenment to Christianity. He lived in Denmark from 1813 to 1855. His works were written to the single individual who might be interested in reading them.
God had lodged a veto— such love of God as Kierkegaard had conceived could not co-exist with the love of a human being. It compelled him to an asceticism as rigorous as that of the saints and indeed, from this moment Kierkegaard’s life was in every sense that of a saint. He is perhaps the most real saint of modern times.