“Save me, O God, from ever being completely sure; keep me unsure until the end so that then, if I receive eternal blessedness, I might be completely sure that I have it by grace! It is empty shadowboxing to give assurances that one believes it is by grace — and then to be completely sure. The true, the essential expression of its being by grace is the very fear and trembling of unsureness. There lies faith.”

Soren Kierkegaard, Christian Discourses: “Resurrection of the Dead” (1848)