What one thinks can very well make a person old, and so can work. I used to work too. Often I preached four sermons on one day. During the whole of one Lent I preached two sermons and gave one lecture every day. This was when I first preached on the Ten Commandments to a large congregation, for to preach on the catechism was then a new and uncommon thing. — Martin Luther April 19, 1538
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