Are God Jesus and the Holy Spirit one person or different people?

Jesus is God...the second person in the Holy Trinity. God in the flesh. God took on humanity 2000 years ago when He was born into this world. He came to save His people from their sins, that was His mission. He died for your sins and mine so we can live. You must accept what He has done on your behalf. You must be "Born Again". See John 3:3. That is why He left heaven; took on flesh, died a horrible death, because He loves us all and wants all to be saved.