Christ saves the entire man — body and soul

Now, since he consists of two parts, body and soul, the point to be inquired into is, in which of these two man would seem to have been lost? If in his body, then it is his body, not his soul, which is lost. What, however, is lost, the Son of man saves. The body, therefore, has the salvation. If, (on the other hand,) it is in his soul that man is lost, salvation is designed for the lost soul; and the body which is not lost is safe. If, (to take the only other supposition,) man is wholly lost, in both his natures, then it necessarily follows that salvation is appointed for the entire man; and then the opinion of the heretics is shivered to pieces, who say that there is no salvation of the flesh. And this affords a confirmation that Christ belongs to the Creator, who followed the Creator in promising the salvation of the whole man.

Tertullian
The Five Books Against Marcion, Book IV
Chapter XXXVII

Belief in the Virgin Birth is necessary for salvation

Whosoever wishes to see Jesus the Son of David must believe in Him; through the Virgin’s birth. He who will not believe this will not hear from Him the salutation, “Thy faith hath saved thee.” And so he will remain blind, falling into Antithesis after Antithesis, which mutually destroy each other, just as “the blind man leads the blind down into the ditch.”

Tertullian
The Five Books Against Marcion, Book IV
Chapter XXXVI

Christ is the only God

For the prayer which He has taught us suits, as we have proved, none but the Creator. It is, of course, another matter if He does not wish to be prayed to, because He is the supremely and spontaneously good God! But who is this good God? There is, He says, “none but one.” It is not as if He had shown us that one of two gods was the supremely good; but He expressly asserts that there is one only good God, who is the only good, because He is the only God.

Tertullian
The Five Books Against Marcion, Book IV
Chapter XXXVI

Christ as God awards everlasting punishment or salvation

If so, you have here, O heretics, during your present lifetime, a warning that Moses and the prophets declare one only God, the Creator, and His only Christ, and how that both awards of everlasting punishment and eternal salvation rest with Him, the one only God, who kills and who makes alive.

Tertullian
The Five Books Against Marcion, Book IV
Chapter XXXIV

The souls of the departed live on in an intermediate state before heaven

It must therefore be evident to every man of intelligence who has ever heard of the Elysian fields, that there is some determinate place called Abraham’s bosom, and that it is designed for the reception of the souls of Abraham’s children, even from among the Gentiles (since he is “the father of many nations,” which must be classed amongst his family), and of the same faith as that wherewithal he himself believed God, without the yoke of the law and the sign of circumcision. This region, therefore, I call Abraham’s bosom. Although it is not in heaven, it is yet higher than hell, and is appointed to afford an interval of rest to the souls of the righteous, until the consummation of all things shall complete the resurrection of all men with the “full recompense of their reward.”

Tertullian
The Five Books Against Marcion, Book IV
Chapter XXXIV

Christ is equal to God

Christ. “All things,” He says, “are delivered unto me of my Father.” You may believe Him, if He is the Christ of the Creator to whom all things belong; because the Creator has not delivered to a Son who is less than Himself all things, which He created by Him, that is to say, by His Word.

Tertullian
The Five Books Against Marcion, Book IV
Chapter XXV

Christ as very God was beyond all possibility of uncleanness

I will tell you how her faith was this above all: it made her believe that her God preferred mercy even to sacrifice; she was certain that her God was working in Christ; she touched Him, therefore, nor as a holy man simply, nor as a prophet, whom she knew to be capable of contamination by reason of his human nature, but as very God, whom she assumed to be beyond all possibility of pollution by any uncleanness.

Tertullian
The Five Books Against Marcion, Book IV
Chapter XX

The woman who kissed the Lord’s feet was justified by faith

The behavior of “the woman which was a sinner,” when she covered the Lord’s feet with her kisses, bathed them with her tears, wiped them with the hairs of her head, anointed them with ointment, produced an evidence that what she handled was not an empty phantom, but a really solid body, and that her repentance as a sinner deserved forgiveness according to the mind of the Creator, who is accustomed to prefer mercy to sacrifice. But even if the stimulus of her repentance proceeded from her faith, she heard her justification by faith through her repentance pronounced in the words, “Thy faith hath saved thee,” by Him who had declared by Habakkuk, “The just shall live by his faith.”

Tertullian
The Five Books Against Marcion, Book IV
Chapter XVIII

Jesus is the source of the Holy Spirit

Now, that the very Lord Himself of all might, the Word and Spirit of the Father, was operating and preaching on earth, it was necessary that the portion of the Holy Spirit which, in the form of the prophetic gift, had been through John preparing the ways of the Lord, should now depart from John, and return back again of course to the Lord, as to its all-embracing original.

Tertullian
The Five Books Against Marcion, Book IV
Chapter XVIII

Christ, the God-man, founded the Church

There come to Him from Tyre, and from other districts even, a transmarine multitude.  This fact the psalm had in view:  “And behold tribes of foreign people, and Tyre, and the people of the Ethiopians; they were there. Sion is my mother, shall a man say; and in her was born a man” (forasmuch as the God-man was born), and He built her by the Father’s will; that you may know how Gentiles then flocked to Him, because He was born the God-man who was to build the church according to the Father’s will—even of other races also.

Tertullian
The Five Books Against Marcion, Book IV
Chapter XIII