The lack of acknowledgement of Paul or his body of work by early 2nd century writers. Robert M Price thinks the Pauline letters are the product of a few people like Polycarp, someone in the Marcionite community, and a 2nd century Paul.
a) According to Hyppolitus of Rome, the Naassenes were among the first gnostics, probably starting around 110 CE.
From 'Against All Heresies", book 5, chapter 2:
"What, however, the natural use is, according to them, we shall afterwards declare. "And likewise also the men, leaving the natural use of the woman, burned in their lust one toward another; men with men working that which is unseemly"- now the expression that which is unseemly signifies, according to these (Naasseni), the first and blessed substance, figureless, the cause of all figures to those things that are moulded into shapes,-"and receiving in themselves that recompense of their error which was meet."30 For in these words which Paul has spoken they say the entire secret of theirs, and a hidden mystery of blessed pleasure, are comprised."
It seems that very early, they made use of Paul and Romans 1:27 (in bolded italics).
Also in chapter 3 of same book:
"Paul the apostle, he says, knew of this gate, partially opening it in a mystery, and stating "that he was caught up by an angel, and ascended as far as the second and third heaven into paradise itself; and that he beheld sights and heard unspeakable words which it would not be possible for man to declare."
Here they made use of 2 Corinthians 12:3-4 (in bolded italics)
Also in same chapter:
These are, he says, what are by all called the secret mysteries, "which (also we speak), not in words taught of human wisdom, but in those taught of the Spirit, comparing spiritual things with spiritual. But the natural man receiveth not the things of the Spirit of God, for they are foolishness unto him."
Here these Naassenes made use of 1 Corinthians 2:13-14a (in bolded italics).
b) Origen said gnostic Basilides (120-140) wrote:
"Indeed, the Apostle [Paul]
has said, "I was once alive apart from the law," [Rom 7:9]
at some time or other. That is [Paul means]
, before I came into this body, I lived in the kind of body that is not subject to the law: the body of a domestic animal or a bird." (Commentary on the Epistle to the Romans 1015B)
Cordially, Bernard