Paul declared to Timothy: There is one God, and one mediator also between God and men, the man Christ Jesus ... - I Timothy 2:5. Hebrews 12:24 refers to Jesus as the mediator of a new covenant...

Jesus Christ was sent to earth by God the Father to bestow God's unmerited grace upon sinners, saving us from our sins; and to reveal God's truth to mankind, giving us true insights in to the character and will of God and the nature of life in this universe so we can live for our Creator's glory. Therefore, when Paul says that this is a faithful saying and worthy of all acceptance that Christ Jesus came into the world to save sinners, he was speaking of this redemption and revelation. For this reason John says of Him: And the Word became flesh, and dwelt among us, and we beheld His glory, glory as of the only begotten from the Father, full of grace and truth. -- For of His fullness we have all received, and grace upon grace. For the law was given through Moses; grace and truth were realized through Jesus Christ. - John 1:14, 17