First, then, with Augusta to lead them on, the Brethren enlisted in the Protestant army, and held the banner of their faith aloft that all the world might see. As the Protestants in Germany had issued the Confession of Augsburg, and had it read in solemn style before the face of the Emperor, Charles V., so now the Brethren issued a new and full "Confession of Faith," to be sent first to George, Margrave of Brandenburg, and then laid in due time before Ferdinand, King of Bohemia. It was a characteristic Brethren's production.[35] It is perfectly clear from this Confession that the Brethren had separated from Rome for practical rather than dogmatic reasons. It is true the Brethren realised the value of faith; it is true the Confession contained the sentence, "He is the Lamb that taketh away the sins of the world; and whosoever believeth in Him and calleth on His name shall be saved"; but even now the Brethren did not, like Luther, lay stress on the doctrine of justification by faith alone. And yet Luther had no fault to find with this Confession. It was addressed to him, was printed at Wittenberg, was issued with his consent and approval, and was praised by him in a preface. It was read and approved by John Calvin, by Martin Bucer, by Philip Melancthon, by pious old George, Margrave of Brandenburg, and by John Frederick, Elector of Saxony. Again and again the Brethren sent deputies to see the great Protestant leaders. At Wittenberg, Augusta discussed good morals with Luther and Melancthon; and at Strasburg, Cerwenka, the Brethren's historian, held friendly counsel with Martin Bucer and Calvin. Never had the Brethren been so widely known, and never had they received so many compliments. Formerly Luther, who liked plain speech, had called the Brethren "sour-looking hypocrites and self-grown saints, who believe in nothing but what they themselves teach." But now he was all good humour. "There never have been any Christians," he said, in a lecture to his students, "so like the apostles in doctrine and constitution as these Bohemian Brethren." "Tell your Brethren," he said to their deputies, "to hold fast what God has given them, and never give up their constitution and discipline. Let them take no heed of revilements. The world will behave foolishly. If you in Bohemia were to live as we do, what is said of us would be said of you, and if we were to live as you do, what is said of you would be said of us." "We have never," he added, in a letter to the Brethren, "attained to such a discipline and holy life as is found among you, but in the future we shall make it our aim to attain it."