Stephen did not die without a speedy trial! He was first dragged before the high priest and the rigid religious council, before whom Stephen refused to recant his preaching of Christ the Savior who gives New Birth. Found guilty of blasphemy he continues to preach salvation in Christ as the stoning ends his life and he commits his spirit to the Lord at last breath. Saul, the bystander, is receiving Stephen's witness in this dramatic event.
The tentmaker, Roman Jew, devout student of rabbinical scholar Gamaliel, Saul is energized by the stoning-crowd's fury to stamp out the motley fools called Christians of The Way who believe in the Nazarene's holiness. Saul is now on his high horse traveling a dusty road when a tremendous flash of lightening knocks Saul to the ground, injured and blinded.
All of Saul's dogmatic religious learning falls away in the flash as now, Saul's personal experience takes precedence. Within those moments of abasement, Christ speaks into Saul's heart and mind then Saul becomes Paul the Apostle of Christ Resurrected. For all the book learning that Saul has had, it is the personal experience of Christ that transforms him and changes us.
Paul uses every bit of his religious learning as the first step forward when speaking and witnessing to countless others for Christ, yet always culminates with an open invitation to abase and receive Christ in a personal way. New life in Christ overlays the old ways. Paul simply explains salvation and new holiness (sanctification) understandable, yet continually drives home each person's personal experience of Christ. Transformation of heart and mind by Christ is experienced; Baptism into New Life bestows the Holy Spirit or the real Presence of Christ within our hearts.
Paul gives us his theology in Romans. And in 2 Corinthians his Christian autobiography (a fragment) outlines Paul's sufferings for Christ: 5 times Paul received 39 lashes at the hands of his persecutors, 3 times he was beaten with rods, 1 time he was stoned and lived through it, 3 times on missionary journeys he was shipwrecked and by the mercy of God survived. There was also danger at the hands of hostile foreigners, raging rivers, bands of robbers, thirsts when drink nowhere, hunger, cold exposure, and abandonment on barren mountain trails.
Baseline theology of Apostle Paul which reflects determination and full confidence in Christ is this: (Paul's words) Romans 8:38-39 “For
I am sure that neither death nor life, nor angels nor rulers, nor
things present nor things to come, nor powers, nor height nor depth, nor
anything else in all creation, will be able to separate us from the
love of God in Christ Jesus our Lord.”