The blue part means something like this: Kierkegaard gave a final account of ( or judgment on) the whole Protestant Reformation. The reckoning point is the point in time when everything is totalled up, calculated (reckoned) -- the pros and the cons -- and we have a final account of the situation. It suggests the day of final judgment.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.