The soul is temporarily separated from body before the resurrection

And if we live throughout holily and righteously, we are happy here, and shall be happier after our departure hence; not possessing happiness for a time, but enabled to rest in eternity.

Clement of Alexandria
The Stromata, Book V
Chapter XIV

The Greeks had vague references to the Trinity

For I pass over Plato; he plainly, in the Epistle to Erastus and Coriscus, is seen to exhibit the Father and Son somehow or other from the Hebrew Scriptures, exhorting in these words: “In invoking by oath, with not illiterate gravity, and with culture, the sister of gravity, God the author of all, and invoking Him by oath as the Lord, the Father of the Leader, and author; whom if ye study with a truly philosophical spirit, ye shall know.” And the address in the Timœus calls the creator, Father, speaking thus: “Ye gods of gods, of whom I am Father; and the Creator of your works.” So that when he says, “Around the king of all, all things are, and because of Him are all things; and he [or that] is the cause of all good things; and around the second are the things second in order; and around the third, the third,” I understand nothing else than the Holy Trinity to be meant; for the third is the Holy Spirit, and the Son is the second, by whom all things were made according to the will of the Father.

Clement of Alexandria
The Stromata, Book V
Chapter XIV

To be incorruptible is to participate in divinity

For he who has not the knowledge of good is wicked: for there is one good, the Father; and to be ignorant of the Father is death, as to know Him is eternal life, through participation in the power of the incorrupt One. And to be incorruptible is to participate in divinity; but revolt from the knowledge of God brings corruption.

Clement of Alexandria
The Stromata, Book V
Chapter X

Clement quotes a lost logoi of Jesus

For it is not in the way of envy that the Lord announced in a Gospel, “My mystery is to me, and to the sons of my house;” placing the election in safety, and beyond anxiety; so that the things pertaining to what it has chosen and taken may be above the reach of envy.

Clement of Alexandria
The Stromata, Book V
Chapter X

Clement quotes Clement of Rome as an Apostle

Moreover, in the Epistle to the Corinthians, the Apostle Clement also, drawing a picture of the Gnostic, says: “For who that has sojourned among you has not proved your perfect and firm faith? and has not admired your sound and gentle piety? and has not celebrated the munificent style of your hospitality? and has not felicitated your complete and sure knowledge? For ye did all things impartially, and walked in the ordinances of God;” and so forth.

Clement of Alexandria
The Stromata, Book IV
Chapter XVII