Great antiphons today at Matins:

Ant. Who are you, Lord? I am Jesus whom you are persecuting; you harm only yourself by kicking against the goad.

Ant. 2 Go, Ananias, and seek out Saul, who is praying to me; he is the one I have chosen to make my name known to the Gentiles and their kings, as well as to the people of Israel.

Ant. 3 Paul went into the synagogues and proclaimed to the Jews that Jesus was indeed the Messiah.

And some great stuff in the second reading by St John Chrysostom:

Thus, amid the traps set for him by his enemies, with exultant heart he turned their every attack into a victory for himself; constantly beaten, abused and cursed, he boasted of it as though he were celebrating a triumphal procession and taking trophies home, and offered thanks to God for it all: Thanks be to God who is always victorious in us! This is why he was far more eager for the shameful abuse that his zeal in preaching brought upon him than we are for the most pleasing honors, more eager for death than we are for life, for poverty than we are for wealth; he yearned for toil far more than others yearn for rest after toil. The one thing he feared, indeed dreaded, was to offend God; nothing else could sway him. Therefore, the only thing he really wanted was always to please God.

The most important thing of all to him, however, was that he knew himself to be loved by Christ. Enjoying this love, he considered himself happier than anyone else; were he without it, it would be no satisfaction to be the friend of principalities and powers. He preferred to be thus loved and be the least of all, or even to be among the damned, than to be without that love and be among the great and honored.