Peter told them in both messages , how evil they were in killing Jesus, and exhorted them to repent and believe in Jesus; which the 8000 did.
Here are the two passages in both messages that finally moved them to repentance:
Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
(Acts 2.38)
Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved. (Acts 4.12)
gilbagoes
When the story of Cornelius was in the Bible is when the message of gentile conversion began. Peter had a dream about "clean and unclean" and then went to Cornelius's house. He preached to Cornelius and 6 other men. They received the message and from that point on the message was universal and not limited to just Jews and Jewish converts.
Zephaniah preached his message through his writings. He would write about what God had said to him (speaking because he was a prophet).
He preached the core message of Jesus - the Kingdom of God.
Prophets like Amos and Hosea preached messages addressing social and religious problems in the northern kingdom of Israel. They condemned social injustices, idolatry, and the mistreatment of the poor, calling for repentance and a return to following God's commandments.
Preached a militant message to Native Americans early in the nineteenth century.
He preached of the coming of a new kingdom. They thought he was possibly planing a rebellion but the kingdom he preached was not a earthly one but in the hearts of men.
polypeptide ;D
He preached that life should be enjoyed and cherished and not destroyed by school and work.
Throughout the Gospels Jesus' every message was a witnessing event, which he preached daily.
one that changed the triplet grouping of the genetic message
People must do penance and pray for the conversion of sinners.