The Apostle Peter was on a training course.  God was teaching him that Jesus had come to save everybody who would believe in Him, not only Jews (Acts 10:28).  It was a difficult transition for the devout leader of the apostolic group.  Like the others, he had been brought up to believe that only Israelites could belong to God's people.  Yes, non-Jews could be included if they converted, but otherwise Gentiles (everybody who was not a Jew) would always be excluded.

But Peter had responded to the vision God gave him in Joppa, and just in time to welcome two of Cornelius' servants escorted by a soldier (Acts 10:7-8).  Despite previously believing that it was wrong to go to a Gentile's house, Peter did not hesitate to go to the soldier’s home.   Amazingly, six other Jewish believers went along too (Acts 11:12).  Peter had no idea about what would happen.  He was certainly not expecting that while he was speaking about Jesus, the Holy Spirit would convict their hearts and give them faith to believe the message about forgiveness through faith in Jesus (Acts 10:43).

Neither did he expect that they would experience the same outpouring of the Holy Spirit as the apostles at Pentecost (Acts 2:4).  But when the Gentile Cornelius, with his family and friends, started speaking in tongues and praising God for Jesus - it was obvious that God was doing something new.  He had taken hold of non-Jews and filled them with His Spirit.  Peter, and the Jewish believers from Joppa, now had no doubt that God had also chosen Gentiles to be in His kingdom through Jesus.  And so, he instructed the brothers from Joppa to baptise them.  Those believing Jews were not only witnesses that Gentiles could be saved, but they had started to be personally involved in ministering to them.

When God is opening a new door or chapter in your life, He will not usually show you everything at the beginning.  But He will challenge your wrong prejudices that stop you taking the first step.  He may move quickly, as with Peter, or slowly - but He always brings us to the point of action at just the right time.  Obedience enables us to grow in faith and enables others to grow as well.  It is important to know that people are not defined by their ethnic or religious background, their gender or social status.  Everybody is defined ultimately by how they respond to Jesus and allow themselves to be moved by the Holy Spirit.  So, when God makes it clear that He wants to involve you in extending His kingdom in a way which is new to you, do not argue – simply obey.