When he realized he was talking to Jesus Himself, Saul asked the question that would give Jesus the opportunity He was looking for: ”What shall I do, Lord?” ( Acts 22:10, NKJV ) . The question indicates contrition in view of his actions up to that moment, but more important, it expresses an unconditional willingness to let Jesus guide his life from then on. Taken to Damascus, Saul was to wait for further instructions.
Read more at the source: Tuesday: Ananias’s Visit