_Christianity itself_, as a whole and in all its parts, is essential. All that is in it is essential, and all that is not in it is not essential. We are for christianity itself, not in part, but the whole of it, as it came from the infallible Spirit of all wisdom and all revelation. It is all essential. Nothing may be added to it or taken from it. The “doctrines and commandments of men,” the doctrines of “expediency,” of “deductions” and “inferences,” from _principles_, are not essential; but these are not christianity, nor any part of it. Nothing in christianity can be compromised except at our peril. The wisdom of God gives us no non-essentials. If the wisdom of man pronounces anything given by the wisdom of God, or, which is the same, any part of christianity, non-essential, such wisdom of man must be set aside as presumptuous. What an idea for men to sit on the _grave_ question of _essentials_ and _non-essentials_, in the divine institution given by our Lord and confirmed by the most indubitable signs and wonders! What part of that which has been given by the wisdom of God is essential, and what part is not essential? It is all essential, or the wisdom of God would not have given it, and the authority of God would not have required it. The very circumstance that the infinite wisdom devised it and the infinite authority required it makes the whole of christianity binding. There is not a non-essential in it. III. “How far is diversity to be tolerated?” We are all required to “speak the same thing,” to “teach no other doctrine,” to “preach the word,” to preach no “other gospel,” to teach the things that become “sound doctrine,” and if we “speak not according to his word it is because there is no light in us.” In one word, we are not to have “all sorts of doctrine from all sorts of teachers,” but to “earnestly contend for the faith once for all delivered to the saints.” IV. “How shall we reconcile the right of private judgment with the right of the Church to maintain the faith in its purity, and still preserve the unity of the faith which the word of God enjoins?” The way we have done it for fifty years past. We have had the light of private judgment, and, at the same time, maintained the faith in its purity and preserved the unity of the faith as enjoined in Scripture. Demonstration is better than theory. We have brought the people from all parties, united them in the one faith, made them one in the unity of the Spirit, with the exception of a few erratic spirits, but we have not had more of these than they had in the time of the apostles. They and their mission were predicted in Scripture, and they have come and fulfilled the predictions of the Lord and the apostles without intending or knowing it, and thus furnished an additional evidence that the Scriptures are divinely inspired. IN SEASON AND OUT OF SEASON.