"Luther also had a bowling-alley made for his young friends, where they would disport themselves with running and jumping. He liked to throw the first ball himself and was heartily laughed at when he missed the mark. He would turn then to the young folk and remind them in his pleasant way that many a one who thought he would do better and knock down all the pins at once would very likely miss them all -- as they would often have to find in future their life and calling."
From Life of Luther by Julius Koestlin, pp. 320f.