In the time before Christ, the law functioned as a guardian or tutor, guiding people in their spiritual and moral development. It provided a framework for understanding God's will and living a life that was pleasing to Him. However, the law was never intended to be the ultimate means of salvation. Its purpose was to prepare humanity for the coming of Christ, who would fulfill the law and offer a new covenant based on faith.
With the arrival of Jesus, the role of the law shifted. Instead of being the primary means of maintaining a relationship with God, the law became a tool that pointed to the necessity of faith in Christ. Through Jesus, believers are justified, or declared righteous, not by their adherence to the law, but by their faith in Him. This transition marks a significant change in how people relate to God, moving from a system of rules to a relationship based on trust and faith. This verse highlights the transformative power of faith in Christ, which brings about true spiritual freedom and a deeper connection with God.