The last words of the book even exceed the rest in confidence, and the audacity of his demand that his work should be accepted without question almost takes away one’s breath: “In this book I have not merely theorised; I have set up definite propositions, and these I shall defend; no one will I permit to pass judgment on them, and I advise all to submit to them. May the Lord Whose cause is here vindicated,” he says, addressing himself to Erasmus, “give you light to make of you a vessel to His honour and glory. Amen.”[798] * * * * * The great importance of the work “_De servo arbitrio_” for a knowledge of the religious psychology of its author may warrant a description of some of its other psychological aspects, and first of the connection discernible between the denial of free-will and Luther’s so-called inward experiences, which were supposed to be behind his whole enterprise. He always believed he was following the irresistible pull of grace, and that he was merely treading the path appointed to him from above. In this work he breaks out into a loud hymn in praise of the irresistibility of the Divine action. “All that I have done,” he exclaims, “was not the result of my own will; this God knows, and the world, too, should have known it long ago. Hence, what I am and by what spirit and council I was drawn into the controversy is God’s business.”[799] In this explanation, so typical of his character and way of thinking, is summed up his reply to that argument of Erasmus against his doctrine, particularly of free-will, where the latter had confronted him with the teaching of the whole of the Church’s past. For more than ten years, Luther adds, he had to listen to the reproach of his conscience: How dare you venture to overthrow the ancient teaching of all men and of the Church, which has been confirmed by saints, martyrs and miracles? “I do not think anyone has ever had to fight with this objection as I had. Even to me it seemed incredible that this impregnable stronghold which had so long withstood the storms, should fall. I adjure God, and swear by my very soul, that, had I not been driven, had I not been forced by my own insight and the evidence of things, my resistance would not have ceased even to this day.” But, under the higher impulse, he had suffered authorities ancient and modern to pass like a flood over his head that God’s grace might alone be exalted. “Since this is my only object, the spirit of the olden saints and martyrs and their wonder-working power witness in my favour.” The utter rigidity of his doctrine and line of thought, and the connection between his present attack on freedom and his own ostensible unfreedom in God’s hands could hardly be placed in a clearer light than here in Luther’s reply to the argument of Erasmus.