Acts 22:17-21

These four verses here illustrate that Paul began to experience God's direct involvement in his life. This was undoubtedly faith-building so that he would have the spiritual wherewithal to accomplish what God had laid out for him, because God had given him a very difficult and demanding assignment.

But those kinds of interventions were not enough to put the finishing touches on the preparations for his assignment. It is one thing to even personally experience a miraculous occurrence directly from God, and it is another thing altogether for God and His Word to be written on someone's heart. That is very clearly shown by the Israelites in the wilderness. Look what they experienced. Look what they saw. But forty years later they were still no different from what they were when they came out of Egypt. So it is with Paul. Even though he was experiencing miraculous intervention so that his life was saved, it is another thing altogether to have God's Word written in one's heart.