The book of Acts picks up where the gospels left off. Jesus Christ has physically resurrected and has continued teaching is apostles, preparing them for the coming and filling of the Holy Spirit, the formation of the Church and for planet wide preaching of the Gospel.

He is not leaving them alone but is giving them the Holy Spirit to fill and guide them, to bring the gospel everywhere, regardless of race, gender, or economic status, no longer following the Old Covenant law.