Martin Luther's most comprehensive work on justification by faith, his commentary on St. Paul's Epistle to the Galatians is translated and edited from the Latin into a lively style, paralleling his spoken lectures. Combined with the passion and faith expressed in these lectures, the biblical foundation for the crucial doctrine of justification is underscored and expressed to a new audience. The commentary is also a historical document, a recording of a professor in a classroom in 1531 from July to December of that year, which expresses the Reformer's commitment to the good news of Jesus' death in the sinner's place, challenging the reader/hearer to compare St. Paul's theology with what he/she hears in the church today.

There are only two paths: Freedom or Slavery Spirit or Flesh Faith or Law Blessing or Cursing Life or Death Which path are you on? This is Paul's argument in the first letter he ever wrote under the Spirit's inspiration. He wants his readers--then and now--to live in the path of freedom and life. The Galatians had traded salvation by grace alone through faith alone for a "gospel" of works of Law. Paul has some seemingly harsh words for them, because to replace grace with anything else is to destroy the Gospel of Jesus Christ.