A commentary upon the Epistle of Paul the apostle to the Galatians : wherein is set forth most excellently, the glorious riches of God's grace, and the power of the gospel, with the difference between the law and the gospel, and the strength of faith declared : to the joyful comfort and confirmation of all true Christian believers, especially such as are inwardly afflicted and grieved in conscience, and do hunger and thirst for justification in Christ Jesus : for whose case most chiefly this book is translated, printed, and dedicated to the same / by Martin Luther ; to which is prefixed, an account of the life of the author.