“You should diligently learn the Word of God and by no means imagine that you know it. Let him who is able to read take a psalm in the morning, or some other chapter of Scripture, and study it for a while. This is what I do. When I get up in the morning, I pray and recite the Ten Commandments, the Creed, and the Lord’s Prayer with the children, adding any one of the psalms. I do this only to keep myself well acquainted with these matters, and I do not want to let the mildew of the notion grow that I know them well enough. The devil is a greater rascal than you think he is. You do as yet not know what sort of fellow he is and what a desperate rogue you are. His definite design is to get you tired of the Word and in this way to draw you away from it. This is his aim.”
-Martin Luther (WA 32, 64f.).