Our Heavenly Father put on a human body in His saving name “JESUS” to bring humanity His loving mercy. Satan’s desire is that all remain in the darkness of condemnation. Jesus came to bring the world the light of His new covenant of mercy through the gospel.

"But if our gospel be hid, it is hid to them that are lost: in whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.

“For we preach not ourselves, but Christ Jesus the Lord; and ourselves your servants for Jesus' sake. For God, who commanded the light to shine out of darkness, hath shined in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ.

“But we have this treasure in earthen vessels, that the excellency of the power may be of God, and not of us." - 2 Corinthians 4:3-7

The gospel brings the light of God’s mercy. The apostles preached the gospel of Jesus beginning on the day of Pentecost.

"Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.

“For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call." - Acts 2:38-39

Those that believed and obeyed came into salvation.

"Then they that gladly received his word were baptized: and the same day there were added unto them about three thousand souls." - Acts 2:41

Then the Gentiles [non Jews] were added in, beginning with Cornelius and his household.

"While Peter yet spake these words, the Holy Ghost fell on all them which heard the word. And they of the circumcision [Jews] which believed were astonished, as many as came with Peter, because that on the Gentiles also was poured out the gift of the Holy Ghost. For they heard them speak with tongues, and magnify God.

“Then answered Peter, Can any man forbid water, that these should not be baptized, which have received the Holy Ghost as well as we? And he commanded them to be baptized in the name of the Lord. Then prayed they him to tarry certain days." - Acts 10:44-48

Both Jews and Gentiles came out of the darkness of condemnation to walk in the light of the mercy of the gospel.

"But ye are a chosen generation, a royal priesthood, an holy nation, a peculiar people; that ye should shew forth the praises of him who hath called you out of darkness into his marvellous light:

“Which in time past were not a people, but are now the people of God: which had not obtained mercy, but now have obtained mercy." - 1 Peter 2:9-10