Then they that gladly received his word were baptized: and the same day there were added unto them about three thousand souls.
41. They, therefore, which willingly. Luke showeth more plainly how fruitful this one sermon which Peter made was: to wit, that it gained unto Christ about three thousand men. And therewithal he declareth the nature and force of faith when he saith, that with a prompt and ready “Ililari,” cheerful. mind they embraced his word. Therefore, faith must begin with this readiness and willing desire to obey.
Peter's words struck thousands like a rod of God's strength, and what was strange and wonderful was how hard hearts suddenly became attentive, became troubled, became urgent. The Spirit worked by the word to begin and carry on a good work of grace where moments before there had been only resistance.
AI summary
Commenting on Acts 2:37-41
And they continued steadfastly in the apostles' doctrine,.... And which is the same with the doctrine of Christ, of which he is the author, preacher, and subject; the substance of which is peace, pardon, righteousness, and salvation by him: this the apostles received from Christ, and constantly taught in their ministry; for which reason, it is called theirs; and this these young converts had embraced...