"Luther remains master of direct presentation of the truth, Kierkegaard, peer of Christian “indirect impartation” by a Socratic pedagogy. They are two complementary types of mind. In the growing complex, subtle, ratiocinate trend of modern life the bold simplicity of Luther's manly directness needs Kierkegaard's invincible “double-reflectivity” and keen appreciation of the refined intricacies of mind and life as a healthful corrective. Times change and we Christians must change with them in all things somewhat, except in the faith that saves."
January 1, 1970
https://en.wikiquote.org/wiki/Martin_Luther