From Paul, a slave of Christ Jesus, called to be an apostle and set apart for God's good news.
References for Romans 1:1
God promised this good news about his Son ahead of time through his prophets in the holy scriptures. His Son was descended from David.
He was publicly identified as God's Son with power through his resurrection from the dead, which was based on the Spirit of holiness. This Son is Jesus Christ our Lord.
Through him we have received God's grace and our appointment to be apostles. This was to bring all Gentiles to faithful obedience for his name's sake.
You who are called by Jesus Christ are also included among these Gentiles.