“First, when I feel that I have become cool and joyless in prayer because of other task or thoughts (for the flesh and the devil always impede and obstruct prayer), I take my little psalter, hurry to my room, or, if it be the day and hour for it, to the church where a congregation is assembled and, as time permits, I say quietly to myself and word-for-word the Ten Commandments, the Creed, and, if I have time, some words of Christ or of Paul, or some psalms, just as a child might do.”
Throughout the treatise, Scripture is the bedrock on which Luther sees the lie of prayer as being built. He speaks of the Decalogue as “a school text, song book, penitential book, and prayer book,” and recommends that the Christian alternate meditation on the commandments with reflection upon a psalm or another chapter of Scripture day by day. For Luther, it is not the desire for reading Scripture that fuels prayer; it is reading Scripture that fuels the desire for prayer. That the Christian may not feel like praying is one of the Devil’s tricks played on weak and sinful flesh; the answer is the discipline of reading and meditation, both corporate and individual. One might draw an analogy with marital love: the husband is commanded by God’s Word to love his wife. That command is independent of how the husband feels at any given moment. He is to act in a loving way toward her, and as he does so, his love for her will itself deepen and grow. So it is to be with prayer: reading Scripture shapes people in such a way that their prayer life will deepen and grow as a result.
– Carl Trueman, Luther on the Christian Life, pp. 119-120, 122.