The word “mediator” in the New Testament is translated from the Greek word “mesites” (Strong’s Gk. 3316), essentially indicating one who is a “go-between” for the purpose of establishing comprehension, harmony and unity between two entities (parties).
The New Testament calls Moses a mediator since God chose him to be the medium between God and the people of Israel (Galatians 3:19). But the ultimate Mediator is Christ Jesus, the one and only Mediator between God and man. He alone made reconciliation possible between God and man by his atoning sacrifice, as clearly seen in the following passage of Scripture.
1 Timothy 2:3-6
For this is good and acceptable in the sight of God our Savior, (4) who desires all men to be saved and to come to the knowledge of the truth. (5) For there is one God and one Mediator between God and men, the Man Christ Jesus, (6) who gave Himself a ransom for all, to be testified in due time. (Matthew 20:28; Mark 10:45)
But now He has obtained a more excellent ministry, inasmuch as He [Christ Jesus] is also Mediator of a better covenant, which was established on better promises.
(2 Corinthians 3:6-9; Hebrews 7:22)
But Christ came as High Priest of the good things to come, with the greater and more perfect tabernacle not made with hands, that is, not of this creation. (12) Not with the blood of goats and calves, but with His own blood He entered the Most Holy Place once for all, having obtained eternal redemption. (13) For if the blood of bulls and goats and the ashes of a heifer, sprinkling the unclean, sanctifies for the purifying of the flesh, (14) how much more shall the blood of Christ, who through the eternal Spirit offered Himself without spot to God, cleanse your conscience from dead works to serve the living God? (15) And for this reason He is the Mediator of the new covenant, by means of death, for the redemption of the transgressions under the first covenant, that those who are called may receive the promise of the eternal inheritance.
(Acts 20:28; Romans 3:25; 5:6; Ephesians 1:7; 5:2; Colossians 1:14; Titus 2:14; Hebrews 1:3; 3:1; 7:22, 27; 8:2, 6; 9:26, 28; 10:1, 4, 10; 12:24; 1 Peter 1:18, 19; 3:18; 1 John 1:7; Revelation 1:5; 5:9)
But you have come to Mount Zion and to the city of the living God, the heavenly Jerusalem, to an innumerable company of angels, (23) to the general assembly and Church of the firstborn who are registered in heaven, to God the Judge of all, to the spirits of just men made perfect, (24) to Jesus the Mediator of the new covenant, and to the blood of sprinkling that speaks better things than that of Abel. (Exodus 24:8; Luke 10:20; Philippians 4:3; Hebrews 8:6; 9:15; 11:4;
1 Peter 1:2)
Just as the Son of Man [Christ Jesus] did not come to be served, but to serve, and to give His life a ransom for many. (Matthew26:28; Mark 10:45; 1 Timothy 2:6; Titus 2:14)
For the law was given through Moses, but grace and truth came through Jesus Christ. (John 8:32; Romans 3:24; 5:21)
And you shall know the truth, and the truth shall make you free. (Romans 6:14, 18, 22; 8:2; James 1:25; 2:12)
I [Christ Jesus] am the door. If anyone enters by Me, he will be saved, and will go in and out and find pasture. (John 14:6; Ephesians 2:18)
Then Jesus cried out and said, “He who believes in Me, believes not in Me but in Him who sent Me. (45) And he who sees Me sees Him who sent Me. (46) I have come as a light into the world, that whoever believes in Me should not abide in darkness.” (Mark 9:37; John 3:19; 8:12; 9:5, 39; 12:35, 36; 14:9; 1 Peter 1:21)
Jesus said to him, “I am the way, the truth, and the life. No one comes to the Father except through Me.” (John 1:4, 17; 8:32; 10:9; 11:25; Ephesians 2:18)
Therefore take heed to yourselves and to all the flock, among which the Holy Spirit has made you overseers, to shepherd the Church of God which He purchased with His [Christ Jesus] own blood. (Ephesians 1:7; Colossians 1:14; Hebrews 9:12, 14; 1 Peter 1:18, 19; Revelation 5:9)
But now the righteousness of God apart from the law is revealed, being witnessed by the Law and the Prophets, (22) even the righteousness of God, through faith in Jesus Christ, to all and on all who believe. For there is no difference; (23) for all have sinned and fall short of the glory of God, (24) being justified freely by His grace through the redemption that is in Christ Jesus, (25) whom God set forth as a propitiation [i.e., satisfaction to God] by His blood, through faith, to demonstrate His righteousness, because in His forbearance God had passed over the sins that were previously committed, (26) to demonstrate at the present time His righteousness, that He might be just and the justifier of the one who has faith in Jesus. (Colossians 1:20; 1 John 2:2; 4:10)
Romans 5:1, 2, 6, 8b
Therefore, having been justified by faith, we have peace with God through our Lord Jesus Christ, (2) through whom also we have access by faith into this grace in which we stand, and rejoice in hope of the glory of God. (6) For when we were still without strength, in due time Christ died for the ungodly. . . . (8b) Christ died for us. (Isaiah 32:17; John 10:9, 14:6; 16:33; Romans 3:28, 30; 4:25; 5:8; Ephesians 2:14; Colossians 1:20; Hebrews 10:19; 1 Peter 3:18; 1 John 3:16; 4:9, 10)
2 Corinthians 5:18, 19
Now all things are of God, who has reconciled [i.e., to change from enmity to friendship] us to Himself through Jesus Christ, and has given us the ministry of reconciliation, (19) that is, that God was in Christ reconciling the world to Himself, not imputing their trespasses to them, and has committed to us the word of reconciliation. (Romans 3:24, 25; 5:10; Ephesians 2:16; Colossians 1:20; 1 John 2:2; 4:10)
In Him [Christ Jesus] we have redemption through His blood, the forgiveness of sins, according to the riches of His grace. (Acts 20:28; Romans 2:4; 3:24; 9:23; Ephesians 2:7; 3:8, 16; Philippians 4:19; Colossians 1:14; Hebrews 9:12; 1 Peter 1:18, 19; Revelation 5:9)
For through Him [Christ Jesus] we both have access by one Spirit to the Father.
(John 14:6; Romans 5:1, 2; 1 Corinthians 12:13; Ephesians 3:12; 4:4; Hebrews 4:16; 10:19, 20; 1 Peter 3:18)
In whom [Christ Jesus] we have redemption through His blood, the forgiveness of sins.
(Acts 20:28; Romans 3:24; Ephesians 1:7; Hebrews 9:12; 1 Peter 1:18, 19; Revelation 5:9)
1 Peter 1:18, 19
Knowing that you were not redeemed with corruptible things, like silver or gold, from your aimless conduct received by tradition from your fathers, (19) but with the precious blood of Christ, as of a lamb without blemish and without spot. (Exodus 12:5; Isaiah 53:7; John 1:29, 36; Acts 20:28; 1 Corinthians 5:7; Ephesians 1:7; Hebrews 9:12, 14; Revelation 5:9)
1 Peter 3:18
For Christ also suffered once for sins, the Just for the unjust, that He might bring us to God, being put to death in the flesh but made alive by the Spirit. (Romans 5:6; Hebrews 9:26, 28)
But now He [Christ Jesus] has obtained a more excellent ministry, inasmuch as He is also Mediator of a better covenant, which was established on better promises.
(2 Corinthians 3:6, 8, 9; Hebrews 7:22)
And for this reason He [Christ Jesus] is the Mediator of the new covenant, by means of death, for the redemption of the transgressions under the first covenant, that those who are called may receive the promise of the eternal inheritance. (Romans 3:25; 5:6; 1 Timothy 2:5; Hebrews 3:1; 7:22; 8:6; 12:24; 1 Peters 3:18)
Hebrews 9:26, 28a
He then would have had to suffer often since the foundation of the world; but now, once at the end of the ages, He has appeared to put away sin by the sacrifice of Himself. . . . (28a) so Christ was offered once to bear the sins of many. (Matthew 26:28; Ephesians 1:10; Hebrews 10:10; 1 Peter 2:24; 3:18; 1 John 3:5)
1 John 2:2
And He Himself [Christ Jesus] is the propitiation [i.e., total satisfaction (to God)] for our sins, and not for ours only but also for the whole world. (John 1:29; 4:42; Romans 3:25;
2 Corinthians 5:18, 19; 1 John 1:7; 4:10, 14)
1 John 4:10
In this is love, not that we loved God, but that He loved us and sent His Son to be the propitiation [i.e., total satisfaction (to God)] for our sins. (Romans 5:8, 10; Titus 3:4; 1 John 2:2)
And they sang a new song, saying: “You are worthy to take the scroll, and to open its seals; for You [Christ Jesus] were slain, and have redeemed us to God by Your blood out of every tribe and tongue and people and nation.” (Acts 20:28; Romans 3:24; Ephesians 1:7; Colossians 1:14; Hebrews 9:12; 1 Peter 1:18, 19; 2 Peter 2:1)