Jesus was declared to be the Son of God in power according to the Spirit of holiness by His resurrection from the dead. Romans 1:4
God had said it a few times already. The voice from heaven declared Jesus to be His Son at His baptism. God reiterated this truth when Jesus’ appearance was transfigured before some of His disciples. When called upon as Father, God responded. Peter and the disciples when asked who they said Jesus was, declared Him to be the Christ, the Son of the living God. Over and over Jesus was declared to be God’s only Son.
In His resurrection from the dead, Jesus has proven these declarations once for all. Jesus is the Son of God. He is Lord of all. He is raised from the dead. He now goes about making declarations of His own. He declares you forgiven. He declares you loved by God. He declares you will be raised from the dead just as He is.
Jesus, declare yourself my Lord. Amen.