Question 4 asks, "What does the Law of God require of us?" The answer surprises us. Instead of quoting from the Ten Commandments, the catechism quotes Christ's words in Matthew 22:37–40: we must love God with all our heart, soul, mind, and strength, and love our neighbor as ourselves. Jesus cites the Shema (Deuteronomy 6:5) to show that the greatest commandment is wholehearted love for God. This command exposes the true condition of our hearts. God, our Creator and Savior, is worthy of supreme love. Loving Him is the foundation of worship and the fulfillment of the entire law. As Augustine described in the ordo amoris ("order of love"), God must be loved above all, and our love for others flows from that supreme love. To love God with the whole heart means loving Him with our entire being—our thoughts, desires, will, and actions. Scripture teaches that the heart is the center of life, from which all actions flow (Prov. 4:23). Yet when we examine ourselves honestly, we see that we often love other things more than God. The story of the rich young ruler illustrates this truth. Though he believed he had kept the commandments, Jesus revealed his idolatry—he loved his wealth more than God. Christ also commands us to love our neighbor, showing that genuine love for God necessarily produces practical love for others. The parable of the Good Samaritan teaches that this love is active, costly, and extends even to enemies. Ultimately, God's law shows both our sin and misery and the life of gratitude He requires. Yet believers can love God only because He first loved us (1 John 4:19).