We're Not Aliens: Romans 1.1-7 Greetings

Paul, a bond-servant of Christ Jesus, called as an apostle, set apart for the gospel of God, which He promised beforehand through His prophets in the holy Scriptures, concerning His Son, who was born of a descendant of David according to the flesh, who was declared the Son of God with power by the resurrection from the dead, according to the Spirit of holiness, Jesus Christ our Lord, through whom we have received grace and apostleship to bring about the obedience of faith among all the Gentiles for His name's sake, among whom you also are the called of Jesus Christ; to all who are beloved of God in Rome, called as saints: Grace to you and peace from God our Father and the Lord Jesus Christ.
Romans 1:1‭-‬7 NASB

Paul doesn't waste words. He knows who he is in Christ, and identifies himself.

He is a bond-servant of Jesus. Some translations use the term "servant" or "slave". I prefer the term "bond-servant".

A servant works for another for pay. It is a job which he is free to leave at any time and for any reason.
A slave is indentured into service; forced to work against his will.
A bond-servant willingly offers himself into service to pay a debt. Once the agreement for service is reached, the bond-servant is not free to walk away. He must pay back the debt in full to redeem himself. The debt we owe Jesus is our very life. We may choose to be His bond-servant, or we may choose not to be, but we can never pay back the debt in full. In short, when we choose to be His, we are His forever. This is also the most common translation of the greek word 'doulos'.

He is called to be an apostle. You can think of an apostle as a bond-servant with authority. This is not a position he chose out of personal ambition, but because he was called.
He was set aside to preach the gospel concerning Jesus.

Regarding Jesus