As the crowd questions what they are witnessing, Peter stands and addresses them, explaining that the outpouring of the Spirit fulfills Joel's prophecy that God would pour out His Spirit on all flesh. He draws on Psalms 16 and 110 to argue that David anticipated both the resurrection and exaltation of Jesus, grounding his message in the Hebrew Scriptures. The Spirit's empowerment is evident not only in Peter's boldness but in his ability to interpret and apply Scripture in a coherent, persuasive way. He concludes with a direct declaration: God has made Jesus, the one they crucified, both Lord and Messiah. How do you discern whether boldness in your speech is coming from the Spirit, or from yourself?