This sermon introduces the Book of Galatians, emphasizing its central theme of Christian liberty and freedom from legalism. Galatians addresses the fundamental question of how believers are justified—by faith in Christ alone, not by works of the law. Written by Paul around 48-49 AD to churches in Galatia (modern-day Turkey), the letter combats the teaching of Judaizers who insisted Gentile believers must follow Mosaic law and be circumcised to be saved. Paul argues that righteousness comes through grace by faith, not through adherence to ceremonial law. The sermon traces how Paul develops the phrase "the just shall live by faith" (from Habakkuk 2:4) across three books: Romans (justification), Galatians (living in Christ's freedom), and Hebrews (faith). The message emphasizes that Jesus' blood doesn't merely cover sin as Old Testament sacrifices did, but cleanses sin completely and permanently. True Christian liberty means being free from legalism while not using freedom as license for fleshly indulgence, but rather walking in step with the Spirit.