Jesus, Inspiration for Paul's 180 degree turnaround

"And Paul went in, as was his custom, and for three weeks he argued with them
from the scriptures, explaining and proving that it was necessary for the Christ
to suffer and to rise from the dead....So he argued in the synagogue with the
Jews and the devout persons, and in the marketplace every day with those who
chanced to be there....And he entered the synagogue and for three months spoke
boldly, arguing and pleading about the kingdom of God....And he expounded the
matter to them from morning till evening, testifying to the kingdom of God and
trying to convince them about Jesus both from the law of Moses and from the
prophets. And some were convinced from what he said, while others disbelieved.

Acts 17:2-3,17, 19:8, 28:23-4
RSV