But the apostle Paul is thinking of something more than moral principle, splendid as is the influence of a great principle on the healthy action of a life. He is thinking of something even finer and deeper than this, and in which the moral principle is included. He is thinking of a soul belted with the more distinctive truth of the Scriptures, a soul girt about with gospel truth and with the ample promises of God. He is thinking of a man who takes some great truth of revelation, some mighty word of life, or some broad and bracing promise of grace, and who belts it about his soul and wears it on active service in seeking to do the sovereign will. I know not where to begin, or where to end, when I turn to the pages of biography for examples of men and women who have worn the girdle of gospel truth and promise. Let me dip here and there in the many and brilliant records. Well, then, let us begin with Martin Luther. It is one of the strong characteristics of Luther that he is ever wearing the girdle of truth, and bracing himself with the promises of grace. I open his letters almost at random, in the great year of his life when he defied the pope, and opposed himself to the strength of uncounted hosts. He is writing to Melanchthon on May 26, 1521: "Do not be troubled in spirit; but sing the Lord's song in the night, as we are commanded, and I shall join in. Let us only be concerned about the Word." There you find him putting on the girdle! Once again I find him writing a letter to a poor little company of Christians at Wittenberg: "I send you this thirty-seventh Psalm for your consolation and instruction. Take comfort and remain steadfast. Do not be alarmed through the raging of the godless." There again he is wearing the girdle and urging others to wear it. His loins are girt about with truth. Then again there is John Wesley. Let me give you a glimpse of that noble servant of the spirit as he is putting on the girdle of truth: "When I opened the New Testament at five o'clock in the morning my eyes fell on the words, 'There are given unto us exceeding great and precious promises that we should be partakers of the divine nature.'" He girt his loins with that truth. "Just before I left the room I opened the Book again, and this sentence gleamed from the open page, 'Thou art not far from the Kingdom of God.'" And he girt himself with that promise. He went to St. Paul's that morning, and in the chant there came to him this personal message from the Word: "O Israel, trust in the Lord, for in the Lord there is mercy and in Him there is plenteous redemption, and He shall redeem Israel from all his sins." Do you not see this noble knight belting himself for the great crusade that even now awaits him at the gate?