God has made Jesus both Lord and Christ. God raised him from the dead.

Act 2:22-36
Jesus was a man accredited by God to you by miracles, wonders and signs, which God did among you through him.
Peter said about the David's words in Psalm 16:8-11 and Psalm 110:1 to prove that God has made this Jesus, whom you crucified, both Lord and Christ.
God raised him from the dead, freeing him from the agony of death, because it was impossible for death to keep its hold on him.
God had raised this Jesus to life and we are all witnesses of the fact.
Jesus has received from the Father the promised Holy Spirit and has poured out what you now see and hear.
What shall we do? people and the other apostles asked.
They have killed Jesus by allowing him to be crucified. God has raised him to life.
Why?
Peter clearly explain what happen about Jesus and the Holy Spirit has poured out what they have saw and heard. Jesus has raised from the dead as he said and promised.
All of the apostles be baptised by Holy Spirit they knew what is going on. They all witnesses the face that Jesus has raised from the dead, he is the son of God.
So many miracles, signs and wonders was accredited by the God that Jesus is the Lord.
What shall we do? repent and believe in Him.
How?
Jesus is the son of God and he is the Lord. Jesus has conquered the dead. Praise the Lord and Jesus Christ!