33God has greatly honored Jesus by causing him to rule right beside him MTY in heaven. Jesus has received the Holy Spirit from God his Father, just like God promised. So Jesus has generously/abundantly given us the Holy Spirit, and he has shown that by what you are seeing and hearing.
34We(inc) know that David was not speaking about himself because David did not go up into heaven as Jesus did. Besides that, David himself said this about the Messiah: The Lord God said to my Lord the Messiah, ‘Reign here beside me,
Acts 2
Acts 2:33-34