Luther's _sola-gratia_-doctrine was embodied also in the _Formula of Concord,_ and this with a special endorsement of his book _De Servo Arbitrio._ For here we read: "Even so Dr. Luther wrote of this matter [the doctrine that our free will has no power whatever to qualify itself for righteousness, etc.] also in his book _De Servo Arbitrio; i.e._, Of the Captive Will of Man, in opposition to Erasmus, and elucidated and supported this position well and thoroughly [_egregie et solide_]; and afterward he repeated and explained it in his glorious exposition of the book of Genesis, especially of chapter 26. There likewise his meaning and understanding of some other peculiar disputations introduced incidentally by Erasmus, as of absolute necessity, etc., have been secured by him in the best and most careful way against all misunderstanding and perversion; to which we also hereby appeal and refer others." (897, 44; 981, 28.) In the passage of his _Commentary on Genesis_ referred to by the _Formula,_ Luther does not, as has been claimed, retract or modify his former statements concerning the inability of the human will and the monergism of grace, but emphasizes that, in reading _De Servo Arbitrio,_ one must heed and not overlook his frequent admonitions to concern oneself with God as He has revealed Himself in the Gospel, and not speculate concerning God in His transcendence, absoluteness, and majesty, as the One in whom we live and move and have our being, and without whom nothing can either exist or occur, and whose wonderful ways are past finding out. (CONC. TRIGL., 898.) And the fact that the Lutheran theologians, living at the time and immediately after the framing of the _Formula of Concord,_ objected neither to the book _De Servo Arbitrio_ itself nor to its public endorsement by the _Formula of Concord,_ is an additional proof of the fact that they were in complete agreement with Luther's teaching of conversion and salvation by grace alone. (Frank 1, 120.)