Before he returned to his Father, Jesus told his followers to wait in Jerusalem until they received the promised Holy Spirit. About a week later, as recorded in Acts 2:1-24, Jesus poured on his Spirit on his people, and they began to proclaim the mighty deeds of God in different languages. After some from the crowd made fun of them, Peter explained that the gift of the Spirit indicated that the last days had arrived!
When Israel reached Mount Sinai, God showed that he would provide all they needed.
During a time of peace, God built up his church through the preaching of his word and powerful signs.
Having described the experience of Jewish Christians as coming into their full inheritance, Paul described the conversion of Gentiles (non-Jews) in Galatians 4:8-20. Simply...