Acts 9:6

“And he trembling and astonished, etc.] At the light and voice, and appearance of Christ, and especially at the words last spoken; he was now pricked to the heart, and filled with a sense of sin, and loaded with guilt, and had dreadful apprehensions of his state and condition, on account of his past wickedness, and the present course of sin he was in: so persons under first convictions “tremble” at the sight of their sins, which rise up like so many ghosts, and stare them in the face, and load their consciences with guilt; at the swarms of corruptions they see in their carts, which appear to them an habitation of devils, a hold of every foul spirit, and a cage of every unclean and hateful…”

“And he, trembling and astonished, said, Lord, what wilt thou have me to do? And the Lord said--(The most ancient manuscripts and versions of the New Testament lack all these words here [including the last clause of Act 9:5]; but they occur in Act 26:14 and Act 22:10, from which they appear to have been inserted here). The question, "What shall I do, Lord?" or, "Lord, what wilt Thou have me to do?" indicates a state of mind singularly interesting (see on Act 2:37). Its elements seem to be these: (1) Resistless conviction that "Jesus whom he persecuted," now speaking to him, was "Christ the Lord." (See on Gal 1:15-16). (2) As a consequence of this, that not only all his religious views, but…”

“And he, trembling - Alarmed at what he saw and heard, and at the consciousness of his own evil course. It is not remarkable that a sinner trembles when he sees his guilt and danger. And astonished - At what he saw. Lord, what wilt thou have me to do? - This indicates a subdued soul, a humbled spirit. Just before, he had sought only to do his own will; now he inquired what was the will of the Saviour. Just before he was acting under a commission from the Sanhedrin; now he renounced their authority, and asked what the Lord Jesus would have him to do. Just before he had been engaged in a career of opposition to the Lord Jesus; now he sought at once to do his will. This indicates the usual…”

“It shall be told thee - So God himself sends Saul to be taught by a man, as the angel does Cornelius, Act 10:5. Admirable condescension! that the Lord deals with us by men, like ourselves. Acts 9:7”

“trembling: Act 16:29, Act 24:25, Act 24:26; Sa1 28:5; Isa 66:2; Hab 3:16; Phi 2:12 what: Act 2:37, Act 16:30, Act 22:10; Luk 3:10; Rom 7:9, Rom 10:3; Jam 4:6 Arise: Act 9:15, Act 26:16; Eze 16:6-8; Mat 19:30; Rom 5:20, Rom 9:15-24, Rom 10:20; Gal 1:15, Gal 1:16; Ti1 1:14-16 and it: Act 10:6, Act 10:22, Act 10:32, Act 11:13, Act 11:14; Psa 25:8, Psa 25:9, Psa 25:12, Psa 94:12; Isa 57:18 Acts 9:7”