Here, we are persuaded, lies the real secret of the whole matter as regards that class of persons now before us. "A double-minded man is unstable in all his ways." A man who tries to keep one eye on the world, and the other on Christ, will be found to have no eye for Christ, but both eyes for the world. It must be so: Christ must be all or nothing; and hence it is the very height of absurdity to talk of peace or progress, where Christ is not the absorbing object of the soul. Where He is, there will never be any lack of settled peace; and there will be progress. The Holy Ghost is jealous for the glory of Christ, and He can never minister comfort, consolation, or strength to a heart divided between Him and the world. It could not be. He is grieved by such unfaithfulness; and instead of being the minister of comfort, He must be the stern reprover of indulged selfishness, worldliness, and vacillation. Let us look at the case of our apostle. How refreshing it is to contemplate his thorough-going style! His starting was of the right sort. "He forsook all and followed Christ." There was no halting here, at all events; no vacillating between Christ and present things. Boats, nets, fish, natural ties, all are unhesitatingly and unreservedly surrendered, not as a matter of cold duty or legal service, but as the grand and necessary result of having seen the glory and heard the voice of the Son of God. Thus it was with Simon Peter, at the opening of his remarkable career. All was clear and unequivocal, whole-hearted and decided, so far as the starting was concerned; and we must bear this in mind, as we pursue his after history. No doubt, we shall find mistakes and stumblings, failure, ignorance, and sin; but, underneath, and in spite of all this, we shall find a heart true to Jesus--a heart divinely taught to appreciate the Christ of God. This is a grand point. Blunders may well be borne with, when the heart beats true to Christ. Some one has remarked that, "The blunderers do all the work." If this be so, the reason is that those blunderers have real affection for their Lord; and that is precisely what we all want. A man may make a great many mistakes, but if he can say when challenged by his Lord, "Thou knowest that I love Thee," he is sure to come right in the end; and not only so, but, even in the very midst of his mistakes, our hearts are much more drawn to him than to the cold, correct, sleek professor, who thinks of himself, and seeks to make the best of both worlds. Simon Peter was a true lover of Christ. He had a divinely given sense of His preciousness, of the glory of His Person, and the heavenly character of His mission. All this comes out, with much force and freshness, in his varied confessions of Christ, even before the day of Pentecost. We shall glance at one or two of these, not with any view to chronological order, but simply to illustrate and prove the lovely devotedness of this true-hearted servant of Christ.