The lines of Holy Scripture, although written under the inspiration of the Spirit of God (God-inspired), are nevertheless not written at God’s dictation, and the scribes are not an impersonal instrument in God’s hands, like a pencil. A prophet who is a shepherd writes in simple language, while a prophet from a royal palace writes like a highly educated person. Both turn to examples suited to their way of life. Thus, the other apostles write about the Apostle Paul that there is something hard to understand in his epistles:
“as also in all his epistles, speaking in them of these things, in which are some things hard to understand” (2 Pet. 3:16)
And the Apostle Paul himself calls himself untrained in speech, but not in knowledge:
“Even though I am untrained in speech, yet I am not in knowledge” (2 Cor. 11:6)
That is, he writes as he can, although he suffers no lack of knowledge. And indeed, the Apostle Paul, as an educated Pharisee, resorts to complex constructions of meaning. Moreover, sometimes the apostles say directly that they are writing on their own behalf:
“Now concerning virgins: I have no commandment from the Lord; yet I give judgment as one whom the Lord in His mercy has made trustworthy” (1 Cor. 7:25)
It would be more correct to say that Holy Scripture is a joint work of God and man (co-working, synergy):
“For we are God’s fellow workers (συνεργοί [synergoi]); you are God’s field, you are God’s building” (1 Cor. 3:9)