That Really locks the NT, shows the truth, right?
You've nailed it, impossible in the human realm.
So what happened? You're right! Right up there, killing, persecuting Christians, likely on the fast track to a high position.
Jesus knocks him down, speaks. Jesus is God, and if Jesus ever speaks, you listen: the power. Literally, Saul is humbled, and Blinded!
Interesting... Blinded because Saul was blind.
If God removes blindness spiritually, it's gone.
Did you know that many, all? Christians must have this happen?
CSLewis explains well, and I testify to the same experience.
Unless God removes blindness, we don't see.
But you're right, huge miracle, must have blown Head away.
Did you read about their reaction?
And Paul never understood that they were no longer his brethren.
We can only understand so much, go so far being very limited.