No pious heart can find it tiresome and superfluous if they read [the catechism] through each day and take part of it and say it aloud and meditate on it. When they do that with serious, diligent consideration, it will always bring fresh teaching, fresh warnings, fresh admonition, and fresh comfort. Thus the dear catechism is like a bountiful fresh spring; as often as a person comes to it so often will he find a rejuvenating drink.
C. Spangenberg as quoted in Robert Kolb, Martin Luther and the Enduring Word of God, 411-12.
HT: John T. Pless who quoted this in his Didache group on Facebook.