3 I Believe in God the Father Almighty.
But before I begin to discuss the meaning of the words, I think it well to mention that in different Churches some additions are found in this article. This is not the case, however, in the Church of the city of Rome; the reason being, as I suppose, that, on the one hand, no heresy has had its origin there, and, on the other, that the ancient custom is there kept up, that those who are going to be baptized should rehearse the Creed publicly, that is, in the audience of the people; the consequence of which is that the ears of those who are already believers will not admit the addition of a single word. But in other places, as I understand, additions appear to have been made, on account of certain heretics, by means of which it was hoped that novelty in doctrine would be excluded. We, however, follow that order which we received when we were baptized in the Church of Aquileia.
I Believe, therefore, is placed in the forefront, as the Apostle Paul, writing to the Hebrews, says, “He that comes to God must first of all believe that He is, and that He is a rewarder of those who believe in Him.” The Prophet also says, “Unless you believe, you shall not understand.” That the way to understand, therefore, may be open to you, you do rightly first of all, in professing that you believe; for no one embarks upon the sea, and trusts himself to the deep and liquid element, unless he first believes it possible that he will have a safe voyage; neither does the husbandman commit his seed to the furrows and scatter his grain on the earth, but in the belief that the showers will come, together with the sun's warmth, through whose fostering influence, aided by favouring winds, the earth will produce and multiply and ripen its fruits. In fine, nothing in life can be transacted if there be not first a readiness to believe. What wonder then, if, coming to God, we first of all profess that we believe, seeing that, without this, not even common life can be lived. We have premised these remarks at the outset, since the Pagans are wont to object to us that our religion, because it lacks reasons, rests solely on belief. We have shown, therefore, that nothing can possibly be done or remain stable unless belief precede. Finally, marriages are contracted in the belief that children will be born; and children are committed to the care of masters in the belief that the teaching of the masters will be transferred to the pupils; and one man assumes the ensigns of empire, believing that peoples and cities and a well-equipped army also will obey him. But if no one enters upon any one of these several undertakings except in the belief that the results spoken of will follow, must not belief be much more requisite if one would come to the knowledge of God? But let us see what this “short word” of the Creed sets forth.
4. “I Believe in God the Father Almighty.”
The Eastern Churches almost universally deliver the article thus, “I believe in One God the Father Almighty;” and again in the next article, where we say, “And in Christ Jesus, His only Son, our Lord,” they deliver it., “And in One (Lord) our Lord Jesus Christ, His only Son;” confessing, that is, “one God,” and “one Lord,” in accordance with the authority of the Apostle Paul. But we shall return to this by-and-by. For the present, let us turn our attention to the words, “In God the Father Almighty.”
“God,” so far as the human mind can form an idea, is the name of that nature or substance which is above all things. “Father” is a word expressive of a secret and ineffable mystery. When you hear the word “God,” you must understand thereby a substance without beginning, without end, simple, uncompounded, invisible, incorporeal, ineffable, inappreciable, which has in it nothing which has been either added or created. For He is without cause who is absolutely the cause of all things. When you hear the word “Father,” you must understand by this the Father of a Son, which Son is the image of the aforesaid substance. For as no one is called “Lord” unless he have a possession or a servant whose lord he is, and as no one is called “master” unless he have a disciple, so no one can possibly be called “father” unless he have a son. This very name of “Father,” therefore, shows plainly that, together with the Father there subsists a Son also.
But I would not have you discuss how God the Father begot the Son, nor intrude too curiously into the profound mystery, lest haply, by prying too eagerly into the brightness of light inaccessible, you should lose the faint glimpse which, by the gift of God, has been vouchsafed to mortals. Or, if you suppose that this is a subject to be investigated with all possible scrutiny, first propose to yourself questions which concern ourselves, and then, if you are able to deal satisfactorily with them, speed on from earthly things to heavenly, from visible to invisible. Determine first, if you can, how the mind, which is within you, generates a word, and what is the spirit of the memory which is in it; and how these, though diverse in reality and in operation, are yet one in substance or nature; and though they proceed from the mind, yet are never separated from it. And if these, though they are in us and in the substance of our own soul, yet seem to be hidden from us in proportion as they are invisible to our bodily sight, let us take for our enquiry things which are more open to view. How does a spring generate a river from itself? By what spirit is it borne into a rapidly flowing stream? How happens it that, while the river and the spring are one and inseparable, yet neither can the river be understood to be, or can be called, the spring, nor the spring the river, and yet he who has seen the river has seen the spring also? Exercise yourself first in explaining these, and explain, if you are able, things which you have under your hands; and then you may come to loftier matters. Do not think, however, that I would have you ascend all at once from the earth above the heavens: I would first, with your leave, draw your attention to this firmament which our eyes behold, and ask you to explain, if you can, the nature of this visible luminary—how that celestial fire generates from itself the brightness of light, how it also produces heat; and though these are three in reality, how they are yet one in substance. And if you are capable of investigating each of these, even then you must acknowledge that the mystery of the Divine generation is by so much the more diverse and the more transcendent as the Creator is more powerful than the creatures, as the artificer is more excellent than his work, as He who ever is more noble than that which had its beginning out of nothing.
That God then is the Father of His only Son our Lord is to be believed, not discussed; for it is not lawful for a servant to dispute about the nativity of his lord. The Father has borne witness from heaven, saying, “This is My beloved Son, in Whom I am well pleased: hear Him.” The Father says that He is His Son and bids us hear Him. The Son says, “He who sees Me sees the Father also,” and “I and the Father are one,” and “I came forth from God and have come into the world.” Where is the man who can thrust himself as a disputant between these words of Father and Son, who can divide the Godhead, separate its volition, break asunder the substance, cut the spirit in parts, and deny that what the Truth speaks is true? God then is a true Father as the Father of the Truth, not begetting extrinsically, but generating the Son from that which Himself is; that is, as the All-wise He generates Wisdom, as the Just Justice, as the Everlasting the Everlasting, as the Immortal Immortality, as the Invisible the Invisible; because He is Light, He generates Brightness, because He is Mind, He generates the Word.
Source: Commentary on the Apostles' Creed (New Advent)