ANSWER: Some are of "the standing order," having been educated to pray in that posture, as were the ancient Jews and the modern Calvinists. It is said that the Puritans caught cold on Plymouth Rock and it settled in their knees. But this does not account for the stiff-kneed Methodist preachers. Some of them stand because, Zaccheus like, they are too short to be seen by the people, if they kneel behind the pulpit; others are embarrassed by having to stoop down to adjust the kneeling stool, and others think the posture of the body is indifferent so long as they tell God that they come to him on the bended knees of their souls, "as though souls have knees!"
— Steele's Answers p. 138.