The body is raised to be judged according to its deeds

But if each of these things belongs to man by nature, and he requires food for his life, and requires posterity for the continuance of the race, and requires a judgment in order that food and posterity may be according to law, it of course follows, since food and posterity refer to both together, that the judgment must be referred to them too (by both together I mean man, consisting of soul and body), and that such man becomes accountable for all his actions, and receives for them either reward or punishment. Now, if the righteous judgment awards to both together its retribution for the deeds wrought; and if it is not proper that either the soul alone should receive the wages of the deeds wrought in union with the body…

Athenagoras of Athens
The Resurrection of the Dead
Chapter XVIII

Resurrected bodies are composed of body and soul

For whatever has been created for the sake of something else, when that has ceased to be for the sake of which it was created, will itself also fitly cease to be, and will not continue to exist in vain, since, among the works of God, that which is useless can have no place; but that which was created for the very purpose of existing and living a life naturally suited to it, since the cause itself is bound up with its nature, and is recognized only in connection with existence itself, can never admit of any cause which shall utterly annihilate its existence. But since this cause is seen to lie in perpetual existence, the being so created must be preserved for ever, doing and experiencing what is suitable to its nature, each of the two parts of which it consists contributing what belongs to it, so that the soul may exist and remain without change in the nature in which it was made, and discharge its appropriate functions (such as presiding over the impulses of the body, and judging of and measuring that which occurs from time to time by the proper standards and measures), and the body be moved according to its nature towards its appropriate objects, and undergo the changes allotted to it, and, among the rest (relating to age, or appearance, or size), the resurrection. For the resurrection is a species of change, and the last of all, and a change for the better of what still remains in existence at that time.

Athenagoras of Athens
The Resurrection of the Dead
Chapter XII

Resurrected bodies no longer need nourishment

…for the bodies that rise again are reconstituted from the parts which properly belong to them, whereas no one of the things mentioned is such a part, nor has it the form or place of a part; nay, it does not remain always with the parts of the body which are nourished, or rise again with the parts that rise, since no longer does blood, or phlegm, or bile, or breath, contribute anything to the life. Neither, again, will the bodies nourished then require the things they once required, seeing that, along with the want and corruption of the bodies nourished, the need also of those things by which they were nourished is taken away.

Athenagoras of Athens
The Resurrection of the Dead
Chapter VII

God will gather again the bodies that are dead

It behoves, therefore, those who disbelieve or doubt concerning the resurrection, to form their opinion on the subject, not from any view they have hastily adopted, and from what is acceptable to profligate men, but either to assign the origin of men to no cause (a notion which is very easily refuted), or, ascribing the cause of all things to God, to keep steadily in view the principle involved in this article of belief, and from this to demonstrate that the resurrection is utterly unworthy of credit. This they will succeed in, if they are able to show that it is either impossible for God, or contrary to His will, to unite and gather together again bodies that are dead, or even entirely dissolved into their elements, so as to constitute the same persons.

Athenagoras of Athens
The Resurrection of the Dead
Chapter II

Resurrected bodies are constructed from the very same elements

But if to any one it appears sheer nonsense that the body which has mouldered away, and been dissolved, and reduced to nothing, should be reconstructed, we certainly cannot with any reason be accused of wickedness with reference to those that believe not, but only of folly;

…for nothing hinders, according to Pythagoras and Plato, that when the dissolution of bodies takes place, they should, from the very same elements of which they were constructed at first, be constructed again. But let us defer the discourse concerning the resurrection.

Athenagoras of Athens
A Plea for the Christians
Chapter XXXVI

Abortion recognized as murder

And when we say that those women who use drugs to bring on abortion commit murder, and will have to give an account to God for the abortion, on what principle should we commit murder? For it does not belong to the same person to regard the very fetus in the womb as a created being, and therefore an object of God’s care, and when it has passed into life, to kill it;

Athenagoras of Athens
A Plea for the Christians
Chapter XXXV

Traditions of celibacy in the early Church

For as the husbandman throwing the seed into the ground awaits the harvest, not sowing more upon it, so to us the procreation of children is the measure of our indulgence in appetite. Nay, you would find many among us, both men and women, growing old unmarried, in hope of living in closer communion with God.

Athenagoras of Athens
A Plea for the Christians
Chapter XXXIII

Father, Son and Holy Spirit are one essence

For, as we acknowledge a God, and a Son his Logos, and a Holy Spirit, united in essence,—the Father, the Son, the Spirit, because the Son is the Intelligence, Reason, Wisdom of the Father, and the Spirit an effluence, as light from fire; so also do we apprehend the existence of other powers, which exercise dominion about matter, and by means of it, and one in particular, which is hostile to God:

Athenagoras of Athens
A Plea for the Christians
Chapter XXIV

God is immaterial spirit

But grant that they acknowledge the same. What then? Because the multitude, who cannot distinguish between matter and God, or see how great is the interval which lies between them, pray to idols made of matter, are we therefore, who do distinguish and separate the uncreated and the created, that which is and that which is not, that which is apprehended by the understanding and that which is perceived by the senses, and who give the fitting name to each of them,—are we to come and worship images?

Athenagoras of Athens
A Plea for the Christians
Chapter XV

Oneness of the Father, Son and Spirit

Are, then, those who consider life to be comprised in this, “Let us eat and drink, for to-morrow we die,” and who regard death as a deep sleep and forgetfulness (“sleep and death, twin brothers”), to be accounted pious; while men who reckon the present life of very small worth indeed, and who are conducted to the future life by this one thing alone, that they know God and His Logos, what is the oneness of the Son with the Father, what the communion of the Father with the Son, what is the Spirit, what is the unity of these three, the Spirit, the Son, the Father, and their distinction in unity;

Athenagoras of Athens
A Plea for the Christians
Chapter XII