" And notice the order here: “To fear, walk, love, serve with the whole heart, etc.” — all these Moses places ahead of what follows: “to keep the Commandments and statutes, etc.” (v. 13), that you may know that nothing of the outward commandments can be kept which pleases God unless it comes from a heart that fears, loves, obeys, and serves, so that the power of the First Commandment, which is faith, may rule and govern in all commandments and works; without it everything else is only a show and a mask. "

― Martin Luther , Lectures on Deuteronomy