Examine these verses describing Saul’s involvement before Jesus called him.
Act 8:1 And Saul was consenting unto his death. And at that time there was a great persecution against the church which was at Jerusalem; and they were all scattered abroad throughout the regions of Judaea and Samaria, except the apostles.
Act 8:2 And devout men carried Stephen to his burial, and made great lamentation over him.
Act 8:3 As for Saul, he made havock of the church, entering into every house, and haling men and women committed them to prison.
Act 9:1 And Saul, yet breathing out threatenings and slaughter against the disciples of the Lord, went unto the high priest,
Act 9:2 And desired of him letters to Damascus to the synagogues, that if he found any of this way, whether they were men or women, he might bring them bound unto Jerusalem.
But this all changed…
Act 9:13 Then Ananias answered, Lord, I have heard by many of this man, how much evil he hath done to thy saints at Jerusalem:
Act 9:14 And here he hath authority from the chief priests to bind all that call on thy name.
Act 9:15 But the Lord said unto him, Go thy way: for he is a chosen vessel unto me, to bear my name before the Gentiles, and kings, and the children of Israel:
Act 9:16 For I will shew him how great things he must suffer for my name’s sake.
1Co 15:9 For I am the least of the apostles, that am not meet to be called an apostle, because I persecuted the church of God.
1Co 15:10 But by the grace of God I am what I am: and his grace which was bestowed upon me was not in vain; but I laboured more abundantly than they all: yet not I, but the grace of God which was with me.
1Co 15:11 Therefore whether it were I or they, so we preach, and so ye believed.