"May God console you! ... What saddens you ... is the fact that others have occupied the churches by violence, while during this time you are on the outside. It is a fact that they have the premises -- but you have the Apostolic Faith. They can occupy our churches, but they are outside the true Faith. You remain outside the places of worship, but the Faith dwells within you. Let us consider: what is more important, the place or the Faith? The true Faith, obviously. Who has lost and who has won in the struggle -- the one who keeps the premises or the one who keeps the Faith? True, the premises are good when the Apostolic Faith is preached there; they are holy if everything takes place there in a holy way ... "You are the ones who are happy; you who remain within the Church by your Faith, who hold firmly to the foundations of the Faith which has come down to you from Apostolic Tradition. And if an execrable jealousy has tried to shake it on a number of occasions, it has not succeeded. They are the ones who have broken away from it in the present crisis. No one, ever, will prevail against your Faith, beloved Brothers. And we believe that God will give us our churches back some day. "Thus, the more violently they try to occupy the places of worship, the more they separate themselves from the Church. They claim that they represent the Church; but in reality, they are the ones who are expelling themselves from it and going astray. Even if Catholics faithful to Tradition are reduced to a handful, they are the ones who are the true Church of Jesus Christ."
- (Coll. Selecta SS.Eccl.Patrum, Caillau and Guillou Vol. 32, pp. 411-412)
Whosoever will be saved, before all things it is necessary that he hold the Catholic Faith. Which Faith, except a man keep whole and integral, without doubt he shall perish everlastingly. Now the Catholic Faith is this: that we worship one God in Trinity, and Trinity in Unity. Neither confounding the Persons, nor dividing the substance. For there is one person of the Father, another of the Son, and another of the Holy Ghost.
But the Godhead of the Father, of the Son, and of the Holy Ghost is all one, the glory equal, the majesty co-eternal. For such as the Father is, such is the Son, and such is the Holy Ghost.
The Father uncreated, the Son uncreated, the Holy Ghost uncreated; the Father incomprehensible, the Son incomprehensible, and the Holy Ghost incomprehensible; the Father eternal, the Son eternal, the Holy Ghost eternal. And yet, there are not three eternals, but one eternal. As also there are not three uncreated, nor three incomprehensibles; but one uncreated, and one incomprehensible.
So likewise the Father is Almighty, the Son Almighty, and the Holy Ghost Almighty. And yet there are not three Almighties, but one Almighty.
So the Father is God, the Son is God, and the Holy Ghost is God. And yet there are not three Gods, but one God.
So likewise, the Father is Lord, the Son is Lord, and the Holy Ghost is Lord. And yet there are not three Lords, but one Lord.
For, as we are compelled by the Christian verity to acknowledge every Person by Himself to be God and Lord; so we are forbidden by the Catholic religion to say there be three Gods or three Lords. The Father is made by none, neither created nor begotten. The Son is of the Father, not made, nor created, but begotten. The Holy Ghost is of the Father, and of the Son; neither made, nor created, nor begotten, but proceeding.
So there is one Father, not three Fathers; one Son, not three Sons; one Holy Ghost, not three Holy Ghosts. And in this Trinity none is before or after the other. None is greater or less than another, but the whole three Persons are co-equal and co-eternal together.
So that in all things, as is aforesaid, the Unity in Trinity, and the Trinity in Unity is to be worshipped. He therefore that will be saved, must thus think of the Trinity.
Furthermore it is necessary unto eternal salvation that he believe rightly the Incarnation of our Lord Jesus Christ. For the right faith is, that we believe and confess, that our Lord Jesus Christ is God and man. God of the substance of the Father, begotten before the world; and Man of the substance of His Mother, born into the world. Perfect God and perfect Man, of a reasonable soul and human flesh subsisting. Equal to the Father as touching His Godhead, and inferior to the Godhead as touching His Manhood. Who, although He be God, and Man, yet He is not two, but one Christ. One altogether, not by confusion of substance, but by unity of Person. For as the reasonable soul and flesh is one man, so God and man is one Christ. Who suffered for our salvation, descended into hell, rose again the third day from the dead. He ascended into heaven; He sitteth at the right hand of God, the Father Almighty; from whence He shall come to judge the living and the dead. At Whose coming all men shall rise again with their bodies, and shall give account for their works. And they that have done good shall go into everlasting life, and they that have done evil, into everlasting fire.
This, then, is the Catholic Faith, which except a man believe faithfully and firmly, he cannot be saved.