He affirms that the Lord's Prayer is the primary prayer of the Christian, which he asserts contains every prayer that a Christian ought to pray. Bonhoeffer also makes a startling but wise claim that jolts us out of the narrowness of our focus in prayer: "The richness of the Word of God ought to determine our prayer, not the poverty of our heart." Thus we find the book of Psalms to be a rich treasury of prayers that are part of God's inspired word, and therefore a true place to learn how God would have us pray.