CCC 445
© Libreria Editrice Vaticana Source: vatican.va
After his Resurrection, Jesus' divine sonship becomes manifest in the power of his glorified humanity. He was "designated Son of God in power according to the Spirit of holiness by his Resurrection from the dead". Rom 1:3; cf. Acts 13:33. The apostles can confess: "We have beheld his glory, glory as of the only Son from the Father, full of grace and truth." Jn 1:14.
Read the full chapter 2. I Believe in Jesus Christ, the Only Son of God ¶422–682