II. THIS ONENESS ALSO ADMITS OF GREAT VARIETY.—"One, as Thou, Father, art in Me, and I in Thee." Now, of course, we all admit the unity of the Godhead. The first article of the Jew is also the first article of the Christian, that the Lord our God is one God, one in essence, one in purpose, one in action. The Son does nothing of Himself; the Father does nothing apart from the Son; the Holy Ghost proceedeth from the Father and the Son. We cannot, as yet, understand this mystery; but with reverence we accept it as the primary basis of our faith.

But though God is One, there is evidently a variety of function in the ever-blessed Trinity. The Father decrees, the Son executes. The Father sends, the Son is sent. The Father works in Creation, the Son in Redemption and Judgment. And the functions of both Father and Son differ from those of the Holy Spirit.

If, then, the unity of the Church is to resemble the unity of the Godhead, according to our Lord's request, we may expect that it will not be physical, nor mechanical, nor a uniformity; but it will be a variety in unity—a unity of Spirit and purpose, and yet a unity which admits of very diverse functions and operations. Diversities of gifts, but the same Spirit. Differences of administrations, but the same Lord. Diversities of operations, but the same God which worketh all in all.

(1) The very conception of unity involves variety.—You take me out into a piece of waste land, and pointing to a heap of bricks say, "There is a unity." I at once rebut your assertion; there is uniformity undoubtedly, but not unity. Unity requires that a variety of different things should be combined to form one structure and carry out one idea. A collection of bricks is not a unity, but a house is. A pole is not a unity, but a hop-plant is. A snow atom is not a unity, but a snow crystal is. And when our Lord spoke of His disciples as one, He not only expected that there would be varieties amongst them, in character, mind, and ecclesiastical preference; but by the very choice of His words He meant us to infer that it would be so. The unity on which He set His heart was not a uniformity.

(2) But with variety there may be the truest unity.—There is variety in the human body—from eyelash to foot, from heart to blood-disc, from brain to quivering nerve-fibre; yet, in all this variety, each one is conscious of an indivisible unity. There is variety in the tree: the giant arms that wrestle with the storm, the far-spreading roots that moor it to the soil, the myriad leaves in which the wind makes music, the cones or nuts which it flings upon the forest floor; yet for all this it is one. There is a variety in the Bible: variety of authorship—king, prophet, priest, herdsman, and fisherman, scholar, sage, and saint; variety of style—prose, poetry, psalmody, argument, appeal; variety of age—from the days of Moses to those of John, the beloved apostle, writing amid the persecutions of the empire; yet for all this there is a oneness in the Bible which no mere binding could give. So with the Church of Christ: there may be, there must be infinite varieties and shades of thought and work. Some will prefer the methods of Wesley, others the freedom of Congregationalism. Some will pray most naturally through the venerable words of a Liturgy, others in the deep silence of a Friends' Meeting. Some will thrive best beneath the crozier of the Bishop, others in the plain barracks of the Salvation Army; but, notwithstanding all this variety, there may be a deep spiritual unity. Many folds, but one flock; many regiments, but one army; many stones, but one breast-plate. "There is one body, and one Spirit, even as ye are called in one hope of your calling; one Lord, one faith, one baptism, one God and Father of all, who is above all, and through all, and in you all."

III. THE BASIS OF CHRISTIAN UNITY IS THE UNION OF EACH BELIEVER TO CHRIST.—"I in them, that they may be made perfect in one." However much true believers in Christ differ, there are two points in which they agree.

(1) Each believer is in Christ: in Christ's heart, loved with an everlasting love, the beloved name engraven on its secret tables; in Christ's book, enrolled on those pages which are sealed so fast that He alone can break the seven-fold seal; in Christ's hand, which holds the ocean as a drop upon its palm, and which was pierced on Calvary, from which no power shall ever pluck the trembling soul; in Christ's grace, rooted as a tree in luxuriant soil, or a house in a foundation of rock; but above all in Christ's Person, for He is the Head, "from whom the whole body is fitly framed and knit together by that which every joint supplieth." There are innumerable texts which speak of the Church as the Body of Christ (Eph. i. 23; Col. i. 24); and directly a man believes in Christ, he becomes a member of that mystical body. "We are members of His body, of His flesh, and of His bones." You may be a very obscure member, or even a paralyzed member; but be sure of this, if you are a Christian you are in Christ, as the eye is in the eye-socket, the arm in the shoulder-joint, and the finger in the hand.

(2) Christ is in each believer.—The texts that teach Christ's real presence in the believer are as numerous as spring flowers. "Christ liveth in me." "Know ye not that Jesus Christ is in you, except ye be reprobates?" "Ye shall know that I am in My Father, and ye in Me, and I in you." The Lord Jesus is in the heart which makes Him welcome, as the steam is in the piston, as the sap is in the branch, as the blood is in the heart, as the life is in the body. It would be impossible for words to describe a more intense spiritual Oneness than that which is here presented to us. The Saviour is in each of us, as the Father is in Him, and we are in Him, and He in God. "Our life is hid with Christ in God." Therefore we are not only one with Jesus Christ, but through Him we are one with God. "I in them, Thou in Me." The very life of God is pouring its glorious tides through us, and would do so more largely if only we were more receptive and obedient. He pours water out of the mouth of the Congo at the rate of 1,000,000 tons per second; and is willing to do marvels as mighty through each believer. And as this life permeates us all alike, it makes us not only one with the blessed God, but one with all who believe, as the blood makes all the members of the body one, and the sap the branches of the tree.

IV. THE MEANS OF THIS SPIRITUAL UNITY ARE THE INFLUENCES OF THE HOLY SPIRIT.—Influence means inflow. It was by the Holy Spirit that our Lord's human nature was made one with His Father's. And this same Holy Spirit He has bequeathed to us, that He may be the same bond of spiritual life between us and our Lord as He was between our Lord and His Father. May not this be the meaning of His words: "The glory which Thou gavest Me I have given them, that they may be one as we are one"? May not that glory have consisted in the oneness of His human nature with God the Father, by the Holy Spirit? And if so, it may be shared by us. The more that believers receive the indwelling of the Holy Spirit, the more clearly will they appreciate this great mystery, and the more closely will they be drawn to all other believers, hushing jealous thoughts and uncharitable words, and "endeavoring to keep the unity of the Spirit in the bond of peace."

It is abundantly clear, then, that this unity cannot be broken unless we break away from Christ. Men have used that word schism with terrible effect. If a man has broken away from some visible church, they have pointed to him as a schismatic. But what is schism? It is a breaking away from the Body of Christ. But what is the Body of Christ? The Roman Catholic will tell you that it is the Church of Rome; the Anglican will tell you that it is the Church of England; the High Churchman will tell you that it is the collection of churches which hold the doctrine of Apostolic Succession. What vestige of Scriptural proof is there for these assertions? What an absurdity it is to be told that we must submit to an outward rite, or we cannot belong to the Body of Christ! What then would become of all the saints and martyrs who died without membership with one of these visible organizations? No, the Body of Christ, as Scripture plainly teaches, is that great multitude which no man can number, of all nations, and kindreds, and peoples, and tongues, and sects, and eras, who are united by faith with the Saviour. The Church of Christ is not conterminous with any earthly or visible organization; it is long as the ages, wide as the poles, broad as the charity of God; it includes all in heaven and on earth who hold the Head. The only condition of membership in that Church is simple faith in Christ. And the only method of severance from that Church is through the severance of the soul's trust in Christ. He only is a schismatic who ceases to be Christ's.