Paul truly believed that he was living exactly the way God wanted him to. And yet, God challenged his certainty, showed him otherwise, then sent him off on a great and good mission. God is full of good surprises like that.
If you were Ananias, you might not believe any report of the drastic change in Saul unless you heard it, as he did, from Jesus himself. And if you were Saul, you might not experience that drastic change unless you were confronted, as he was, by Jesus himself. Meeting Jesus has that effect on people. Let us keep our minds open for stupendous news. Let us keep our hearts open to profound change. Let us keep our ears open for the Spirit’s message to the church.