Romans

“This epistle is the chief book of the New Testament, the purest gospel. It deserves not only to be known word for word by every Christian, but to be the subject of his meditation day by day, the daily bread of his soul . . .”

Martin Luther, in his preface to the Roman letter

“There is one book in the New Testament that links up with almost everything that the Bible contains: that is the Epistle to the Romans.”

J. I. Packer, Fundamentalism and the Word of God, p.106ff