Søren Kierkegaard: "The Sickness Unto Death - A Christian Psychological Exposition for Upbuilding and Awakening"
“... And this is one of the most crucial definitions for the whole of Christianity; that the opposite of sin is not virtue but faith.”
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Quote: From Søren Kierkegaard: The Sickness Unto Death: A Christian Psychological Exposition for Upbuilding and Awakening:
https://www.goodreads.com/work/quotes/50772-sygdommen-til-d-den