from his experience on the road to Damascus, Saul learnt all the following except that

Saul, later known as Paul, learned many things from his experience on the road to Damascus, including that he had been persecuting the Lord through his persecution of the Church, that his confidence in Judaism was misplaced, and that he was chosen to preach to the Gentiles. He also learned that in persecuting the Church, he was "kicking against the pricks," which means he was resisting something that was inevitable and ultimately hurtful to himself. However, the statement "he could successfully promote his own will" is not a lesson that Saul learned from his experience on the road to Damascus.