Acts 10 is a story in the Bible about a man named Cornelius. Cornelius was a nice and faithful guy who believed in God and helped people. But Cornelius wasn't a Jewish person, and some Jewish people believed that only Jewish people could follow God's rules.
One day, an angel visited Cornelius and told him to send for a man named Peter. Peter was a follower of Jesus and was Jewish, but he didn't think that only Jewish people could follow God's rules.
When Peter arrived at Cornelius' home, he was surprised to find out that God loved all people, not just the Jewish people. He told Cornelius and all his friends about Jesus and how he proved that God loves everyone, no matter who they are.
This was a really important lesson for the early Christians to learn, because it helped them understand that God's love was bigger than just one group of people. It helped people like Cornelius feel welcome in the community, and it helped everyone remember that God's love is for everyone, no matter what.