 In 1530, Luther was drawn into a further Diet, this time at Augsburg but, fearing for his safety, Luther himself remained in Coburg, while his position was represented by his gifted younger protégé Philip Melanchthon (1497–1560), who had first joined Luther in Wittenberg in 1518. The aim of the Diet, to be attended by the Emperor Charles V, was to achieve some reconciliation between the Catholic and reformed positions. Luther forwarded his strongly worded suggestions as to how the latter should be represented in his “exhortation”, but Melanchthon opted instead to present a more moderate position to the Diet, in 28 articles later known as the Augsburg Confession. This was part of a process through which Melanchthon sought to mediate and in some respects soften Luther’s own views, not always to the liking of the latter, though their close relationship remained largely intact. The Diet ended in failure and, fearing suppression from imperial forces, Luther wrote his Warning to his Dear German People (1531), in which now he sanctioned armed resistance, arguing that defence of the gospel overrode civil obedience. Instead, however, the list of Lutheran territories continued to grow, forming the League of Smalcalden in 1531. It was a Diet of this League held in 1537 which Luther was to address with his Smalcald Articles; published in 1538, these contain his last word on confessional and doctrinal issues. He also argued against a council called by the Pope in The Councils and the Church (1539). While still at Coburg, Luther defended some of his practices on translation against critics in On Translating: An Open Letter (1530), particularly the accusation that in Romans 3:28, in the key phrase “faith alone,” the word “alone” is not in Paul’s text. When back in Wittenberg after the Diet of Augsburg, Luther was to lecture on Galatians in 1531, lectures which were published in 1535 and 1538.