The Foundations of Morality

“Kierkegaard and Nietzsche between them effectively destroyed the foundations of morality as they had been known in the West for many centuries, and each proposed in its place a profoundly personal, subjective vision of the moral life, in which choice was of the essence: not choice as it had always been known, between good and evil as defined by the prevailing culture, but rather to define good and evil themselves in an act involving the totality of one’s being. The ‘I’ had become not just the principal character in the moral drama, but its author, the writer of its rules.”

Morality, Chapter 5, p. 82