“Calvin’s literary corpus is well known, with around one hundred discrete volumes published from the time he arrived in Geneva in 1536 until his death twenty-eight years later. During the 1550s, Calvin’s literary output ranged from 100,000 to a remarkable 250,000 published words per year.
Late nights spent writing at his desk by candlelight or long days spent dictating from bed inevitably took a toll on his health and spirits: ‘I get so tired from that endless writing that at times I have a loathing for it, and actually hate writing,’ Calvin complained to Bullinger in 1551.
But true religion needed to be defended in print as well as from the pulpit. ‘I would be a real coward if I saw God’s truth being attacked and remained quiet without a sound.'”
–Scott M. Manetsch, Calvin’s Company of Pastors: Pastoral Care and the Emerging Reformed Church, 1536-1609 (Oxford: Oxford University Press, 2013), 225-226.