Here’s a quote on Calvin and preaching from Gerald McDermott’s The Great Theologians: a Brief Introduction (IVP, 2010):
“Despite his enormous reputation as a theologian, Calvin seems to have considered his preaching to have been more important than his formal theological works. He preached, on average, 170 sermons per year, which is more than three a week. When he was recollecting his accomplishments on his deathbed, he mentioned his sermons ahead of his theological work” (98).
This is a good word for all pastors, especially those of us who enjoy academic theological engagement.