I read the book of esther a few days ago and noticed something interesting. In Esther 3:8-14 We see that kings used secretaries and trusted close friends to write letters or orders under the name of the king. Now can it be the same in 1st centuary that paul gave permission to let a disciple of paul or traveler to write in his name?
I don’t think it inconceivable that some of Paul’s students may have wrote in his name later. It was a common practice of Rabbis, to teach under the authority of the person under whom they were trained.
We see hints of this practice in the Gospels, including immediately after Jesus great teaching sermon (on the Mount) in Matthew 5 through 7.
***When Jesus finished these words, the crowds were astonished at his teaching, for he taught them as one having authority, and not as their scribes. *
(Matthew 7:28-2)
The Chief Priests ask Jesus point blank about where his authority to teach on matters of the mosaic law derived from.
One day as he was teaching the people in the temple area and proclaiming the good news, the chief priests and scribes, together with the elders, approached him and said to him, “Tell us, by what authority are you doing these things? Or who is the one who gave you this authority?” (Luke 20:1-2)
The question of authority was important in the Jewish tradition and many taught under the authority of their teacher. Jesus addresses this directly with his disciples.
***No disciple is superior to the teacher; but when fully trained, every disciple will be like his teacher. *
(Luke 6:40)
Jesus goes on to do what a rabbi would be unlikely to do - he calls his disciples friends.
The idea of authority was clearly laid out by God under Judaism so that it could be carried over into Christianity and perfected in the Church. It is likely that anyone trained by Paul for a long period of time would have seen themselves as having Paul’s authority handed down to him. The right to write and teach under Paul’s name might have been assumed.
-Tim-