Acts 9:6

And he trembling and astonished,.... 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 bird; at the curses of a righteous law which threatens with damnation and death; at the future judgment, and the apprehensions of divine wrath; and at the voice and word of God, which strikes terror, cuts them to the heart, and like an hammer breaks the rock in pieces: and they are "astonished" at their own wickedness and vileness, which they had no conception of before; at the sparing mercy and forbearance of God, who has continued them in being, and not sent them to hell, to be among devils and damned spirits; at the light around by which they see their sins, the plague of their own hearts, the insufficiency of their own righteousness, their lost state by nature, and need of salvation by Christ; and at the doctrines of the Gospel, so far as they have light into them; and at the person of Christ, and at his Father's love and his in procuring salvation for them:said, Lord, what wilt thou have me to do?