Ephesians 4:6

The more, therefore, you see the bishop silent, the more do you reverence him. For we ought to receive every one whom the Master of the house sends to be over His household, as we would do Him that sent him. It is manifest, therefore, that we should look upon the bishop even as we would look upon the Lord Himself, standing, as he does, before the Lord. For “it behoves the man who looks carefully about him, and is active in his business, to stand before kings, and not to stand before slothful men.” And indeed Onesimus himself greatly commends your good order in God, that ye all live according to the truth, and that no sect has any dwelling-place among you. Nor indeed do ye hearken to any one rather than to Jesus Christ, the true Shepherd and Teacher. And ye are, as Paul wrote to you, “one body and one spirit, because ye have also been called in one hope of the faith. …

The Evangelists, too, when they declared that the one Father was “the only true God,” did not omit what concerned our Lord, but wrote: “In the beginning was the Word, and the Word was with God, and the Word was God. The same was in the beginning with God. All things were made by Him, and without Him was not anything made that was made.” And concerning the incarnation: “The Word,” says [the Scripture], “became flesh, and dwelt among us.” And again: “The book of the generation of Jesus Christ, the son of David, the son of Abraham.” And those very apostles, who said “that there is one God,” said also that “there is one Mediator between God and men.” Nor were they ashamed of the incarnation and the passion. For what says [one]? “The man Christ Jesus, who gave Himself” for the life and salvation of the world.

2. Truly, then, the Scripture declared, which says, “First of all believe that there is one God, who has established all things, and completed them, and having caused that from what had no being, all things should come into existence:” He who contains all things, and is Himself contained by no one. Rightly also has Malachi said among the prophets: “Is it not one God who hath established us? Have we not all one Father?” In accordance with this, too, does the apostle say, “There is one God, the Father, who is above all, and in us all.” Likewise does the Lord also say: “All things are delivered to Me by My Father;” manifestly by Him who made all things; for He did not deliver to Him the things of another, but His own. …

1. After this fashion also did a presbyter, a disciple of the apostles, reason with respect to the two testaments, proving that both were truly from one and the same God. For [he maintained] that there was no other God besides Him who made and fashioned us, and that the discourse of those men has no foundation who affirm that this world of ours was made either by angels, or by any other power whatsoever, or by another God. For if a man be once moved away from the Creator of all things, and if he grant that this creation to which we belong was formed by any other or through any other [than the one God], he must of necessity fall into much inconsistency, and many contradictions of this sort; to which he will [be able to] furnish no explanations which can be regarded as either probable or true. …

2. For the Father bears the creation and His own Word simultaneously, and the Word borne by the Father grants the Spirit to all as the Father wills. To some He gives after the manner of creation what is made; but to others [He gives] after the manner of adoption, that is, what is from God, namely generation. And thus one God the Father is declared, who is above all, and through all, and in all. The Father is indeed above all, and He is the Head of Christ; but the Word is through all things, and is Himself the Head of the Church; while the Spirit is in us all, and He is the living water, which the Lord grants to those who rightly believe in Him, and love Him, and who know that “there is one Father, who is above all, and through all, and in us all.” And to these things does John also, the disciple of the Lord, bear witness, when he speaks thus in the Gospel: “In the beginning was the Word, …

Why, moreover, should we not rather recognise, from among (the store of) primitive precedents, those which communicate with the later (order of things) in respect of discipline, and transmit to novelty the typical form of antiquity? For look, in the old law I find the pruning-knife applied to the licence of repeated marriage. There is a caution in Leviticus: “My priests shall not pluralize marriages.” I may affirm even that that is plural which is not once for all. That which is not unity is number. In short, after unity begins number. Unity, moreover, is everything which is once for all. …

40 God all things made;” to whom he plainly owns

24. Consider with what want of judgment you dare to blame those who strive for the truth against falsehood. For who ought more justly to be indignant against the other? whether he who supports God’s enemies, or he who, in opposition to him who supports God’s enemies, unites with us on behalf of the truth of the Church? except that it is plain that the ignorant are also excited and angry, because by the want of counsel and discourse they are easily turned to wrath; so that of none more than of you does divine Scripture say, “A wrathful man stirreth up strifes, and a furious man heapeth up sins.” For what strifes and dissensions have you stirred up throughout the churches of the whole world! Moreover, how great sin have you heaped up for yourself, when you cut yourself off from so many flocks! For it is yourself that you have cut off. …

26. But as far as he is concerned, let us leave him; let us rather deal with that concerning which there is the greatest question. They who contend that persons baptized among the heretics ought to be received as if they had obtained the grace of lawful baptism, say that baptism is one and the same to them and to us, and differs in no respect. But what says the Apostle Paul? “One Lord, one faith, one baptism, one God.” If the baptism of heretics be one and the same with ours, without doubt their faith also is one; but if our faith is one, assuredly also we have one Lord: if there is one Lord, it follows that we say that He is one. …

Nemesianus of Thubunæ said: That the baptism which heretics and schismatics bestow is not the true one, is everywhere declared in the Holy Scriptures, since their very leading men are false Christs and false prophets, as the Lord says by Solomon: “He who trusteth in that which is false, he feedeth the winds; and the very same, moreover, followeth the flight of birds. For he forsaketh the ways of his own vineyard, he has wandered from the paths of his own little field. …

Chapter 12. 18. Nemesianus of Tubunæ said: "That the baptism which is given by heretics and schismatics is not true is everywhere declared in the holy Scriptures, inasmuch as their very prelates are false Christs and false prophets, as the Lord declares by the mouth of Solomon, ‘Whoso trusteth in lies, the same feedeth the winds; he also followeth flying birds. For he deserteth the ways of his own vineyard, and hath strayed from the paths of his own field. …

Chapter 32. 62. Another Victor of Assuras said: "It is written, that ‘there is one God and one Christ, one Church and one baptism.’ How then can any one baptize in a place where there is not either God, or Christ, or the Church?"