Rom 1:1-4, Mt 16:16, Acts 5:42, Acts 9:22, Acts 17:2-3, Acts 18:5
We have been chosen by God to preach the gospel that Jesus is the Christ. (Rom 1:1-4)
Rom 1:1 Paul, a servant of Jesus Christ, called to be an apostle, separated unto the gospel of God, 2 (Which he had promised afore by his prophets in the holy scriptures,) 3 Concerning his Son Jesus Christ our Lord, which was made of the seed of David according to the flesh; 4 And declared to be the Son of God with power, according to the spirit of holiness, by the resurrection from the dead:
Christ also sent us to preach the gospel. (1 Cor 1:17, Acts 5:42)
1 Cor 1:17 For Christ sent me not to baptize, but to preach the gospel: not with wisdom of words, lest the cross of Christ should be made of none effect.
Acts 5:42 And daily in the temple, and in every house, they ceased not to teach and preach Jesus Christ.
The gospel is that Jesus is the Christ, the Son of God. (Mt 16:16)
Mt 16:16 And Simon Peter answered and said, Thou art the Christ, the Son of the living God.
Paul preached the gospel that Jesus is the Christ. (Acts 9:22, Acts 17:2-3, Acts 18:5)
Acts 9:22 But Saul increased the more in strength, and confounded the Jews which dwelt at Damascus, proving that this is very Christ.
Acts 17:2 And Paul, as his manner was, went in unto them, and three sabbath days reasoned with them out of the scriptures, 3 Opening and alleging, that Christ must needs have suffered, and risen again from the dead; and that this Jesus, whom I preach unto you, is Christ.
Acts 18:5 And when Silas and Timotheus were come from Macedonia, Paul was pressed in the spirit, and testified to the Jews that Jesus was Christ.