I have been wondering how Luther and Calvin get to write so many things in their short life span. Take Calvin for example, he wrote The Institutes and commentaries on the books in the Bible. Luther wrote so many sermons, tracts and for example the Bondage of the Will. They were living book machines, tons and tons of them. They wrote so much in such a short span of time and what they wrote are still being read today!
How did they manage this? I have no answer, all I can think of is the fact that they did not have TV back then.