This commentary presents an Indonesian theologian's contemporary interpretation of Isaiah 1-39. According to S. H. Widyapranawa, in Isaiah we see the dynamics of faith in a turbulent world and we hear the prophetic admonition to uphold faith in the Lord and to oppose secularism, false prophecies, and sinful cultic practices. Indeed, this teaching from the eighth century B.C. is of paramount importance for the preaching of God's truth and justice in today's world.