The soul is born with the body

After settling the origin of the soul, its condition or state comes up next.  For when we acknowledge that the soul originates in the breath of God, it follows that we attribute a beginning to it.  This Plato, indeed, refuses to assign to it, for he will have the soul to be unborn and unmade. We, however, from the very fact of its having had a beginning, as well as from the nature thereof, teach that it had both birth and creation.

Tertullian
A Treatise on the Soul
Chapter IV

The soul before and after resurrection

Even now, as the matter refers to thy opinion on a point the more closely belonging to thee, in so far as it bears on thy personal well-being, we maintain that after life has passed away thou still remains in existence, and looks forward to a day of judgment, and according to thy deserts art assigned to misery or bliss, in either way of it for ever; that, to be capable of this, thy former substance must needs return to thee, the matter and the memory of the very same human being: for neither good nor evil couldst thou feel if thou wert not endowed again with that sensitive bodily organization, and there would be no grounds for judgment without the presentation of the very person to whom the sufferings of judgment were due.

Tertullian
The Soul’s Testimony
Chapter IV

Prophecy is sealed after Christ

For after the advent of Christ and His passion there is no longer “vision or prophet” to announce Him as to come. In short, if this is not so, let the Jews exhibit, subsequently to Christ, any volumes of prophets, visible miracles wrought by any angels, (such as those) which in bygone days the patriarchs saw until the advent of Christ, who is now come; since which event “sealed is vision and prophecy,” that is, confirmed.  And justly does the evangelist write, “The law and the prophets (were) until John” the Baptist. For, on Christ’s being baptized, that is, on His sanctifying the waters in His own baptism, all the plenitude of bygone spiritual grace-gifts ceased in Christ, sealing as He did all vision and prophecies, which by His advent He fulfilled. Whence most firmly does he assert that His advent “seals visions and prophecy.”

Tertullian
An Answer to the Jews
Chapter VIII

Christ is to all God and Lord

But Christ’s Name is extending everywhere, believed everywhere, worshipped by all the above-enumerated nations, reigning everywhere, adored everywhere, conferred equally everywhere upon all. No king, with Him, finds greater favor, no barbarian lesser joy; no dignities or pedigrees enjoy distinctions of merit; to all He is equal, to all King, to all Judge, to all “God and Lord.” Nor would you hesitate to believe what we asseverate, since you see it taking place.

Tertullian
An Answer to the Jews
Chapter VII

The law could only have been made obsolete by Christ

Inquire, I say, we must, whether this giver of the new law, observer of the spiritual sabbath, priest of the eternal sacrifices, eternal ruler of the eternal kingdom, be come or no: that, if he is already come, service may have to be rendered him; if he is not yet come, he may have to be awaited, until by his advent it be manifest that the old Law’s precepts are suppressed, and that the beginnings of the new law ought to arise.  And, primarily, we must lay it down that the ancient Law and the prophets could not have ceased, unless He were come who was constantly announced, through the same Law and through the same prophets, as to come.

Tertullian
An Answer to the Jews
Chapter VI

Salvation can’t be earned

He who has compared human things with divine will require no further arguments on these points. And yet the latter opinion ought to be discussed, that God conferred divine honors in consideration of meritorious claims. Well, then, if the award was made on such grounds, if heaven was opened to men of the primitive age because of their deserts, we must reflect that after that time no one was worthy of such honor; except it be, that there is now no longer such a place for any one to attain to. Let us grant that anciently men may have deserved heaven by reason of their great merits. Then let us consider whether there really was such merit. Let the man who alleges that it did exist declare his own view of merit.  Since the actions of men done in the very infancy of time are a valid claim for their deification, you consistently admitted to the honor the brother and sister who were stained with the sin of incest—Ops and Saturn.

Tertullian
Ad Nationes, Book II
Chapter XIII

We will return to the same bodies in the resurrection

Ridicule, therefore, as much as you like the excessive stupidity of such minds as die that they may live; but then, in order that you may be able to laugh more merrily, and deride us with greater boldness, you must take your sponge, or perhaps your tongue, and wipe away those records of yours every now and then cropping out, which assert in not dissimilar terms that souls will return to bodies. But how much more worthy of acceptance is our belief which maintains that they will return to the same bodies!

Tertullian
Ad Nationes, Book I
Chapter XIX

The cross has two beams

Every piece of timber which is fixed in the ground in an erect position is a part of a cross, and indeed the greater portion of its mass.  But an entire cross is attributed to us, with its transverse beam, of course, and its projecting seat.

…Since the head rises upwards, and the back takes a straight direction, and the shoulders project laterally, if you simply place a man with his arms and hands outstretched, you will make the general outline of a cross.

Tertullian
Ad Nationes, Book I
Chapter XII

Early Christians took Eucharist privately, dismissing anyone else

Since, therefore, the Christians are not their own betrayers, it follows that it must be strangers. Now I ask, how could strangers obtain knowledge of us, when even true and lawful mysteries exclude every stranger from witnessing them, unless illicit ones are less exclusive? Well, then, it is more in keeping with the character of strangers both to be ignorant (of the true state of a case), and to invent (a false account). Our domestic servants (perhaps) listened, and peeped through crevices and holes, and stealthily got information of our ways.

…For no doubt, when any desire initiation in the mysteries, their custom is first to go to the master or father of the sacred rites.

Tertullian
Ad Nationes, Book I
Chapter III