7 And then intent on his furious schemes, that Saul received letters from the chief of the priests, and began his journey in his cruel rage, breathing out slaughter, thirsting for blood, to drag bound and to hurry off to punishment whomsoever he could, and from every quarter that he could, and to satiate himself with the shedding of their blood. But where was God, where was Christ, where He that had crowned Stephen? Where, but in heaven? Let Him now look on Saul, and mock him in his fury, and call from heaven, “'Saul, Saul, why do you persecute Me?' I am in heaven, and you in earth, and yet you persecute Me.
Thou dost not touch the body, but my members you are treading down. Yet what are you doing? What are you gaining? 'It is hard for you to kick against the pricks.' Kick as you will, you only distress yourself. Lay aside your fury then, recover soundness. Lay aside evil counsel, seek after good succour.” By that voice he was struck to the earth. Who was struck to the earth? The persecutor. Lo, by that one word was he overcome. After what were you going, after what was your fury carrying you?
Those whom you were seeking out, now you follow; whom you were persecuting, now for them you suffer persecution. He rises up the preacher, who was struck to the earth, the persecutor. He heard the Lord's voice. He was blinded, but in the body only, that he might be enlightened in heart. He was brought to Ananias, catechised on sundry points, baptized, and so came forth an Apostle. Speak then, preach, preach Christ, spread His doctrine, O you goodly leader of the flock, but lately a wolf.
See him, mark him, who once was raging. “But for me, God forbid that I should glory, save in the Cross of our Lord Jesus Christ, by whom the world has been crucified to me and I to the world.” Spread the Gospel: scatter with your mouth what you have conceived in your heart. Let the nations hear, let the nations believe; let the nations multiply, let the Lord's empurpled spouse spring forth from the blood of Martyrs. And from her how many have come already, how many members have cleaved to the Head, and cleave to Him still and believe!
They were baptized, and others shall be baptized, and after them shall others come. Then I say, at the end of the world shall the stones be joined to the foundation, living stones, holy stones, that at the end the whole edifice may be built by that Church, yea by this very Church which now sings the new song, while the house is in building. For so the Psalm itself says, “When the house was in building after the captivity;” and what says it, “Sing unto the Lord a new song, sing unto the Lord all the earth.” How great a house is this!
But when does it sing the new song? When it is in building. When is it dedicated? At the end of the world. Its foundation has been already dedicated, because He has ascended into heaven, and dies no more. When we too shall have risen to die no more, then shall we be dedicated.
Source: Sermons on Selected Lessons of the New Testament (New Advent)