[HarleyD]

The New Covenant is the sacrifice of Christ for the forgiveness of sin verses the Old Covenant of living by the law of Moses. The Old and New Covenant is compared in Hebrews Chap 8-9 and was foretold throughout the Old Testament (for example Jeremiah 31:31-33) and explained in the New Testament.

If people want to take Luke 22:20 literally

And in the same way He took the cup after they had eaten, saying, “This cup, which is poured out for you, is the new covenant in My blood.

They would have to say it was the cup that died for our sins.

If people want to take John 6:52-54 litereally,

Then the Jews began to argue with one another, saying, “How can this man give us His flesh to eat?” So Jesus said to them, “Truly, truly, I say to you, unless you eat the flesh of the Son of Man and drink His blood, you have no life in yourselves. The one who eats My flesh and drinks My blood has eternal life, and I will raise him up on the last day.

Then they would have to conclude that Christ was literally referring to cannibalism and their response would be offensive (I hope).

There is nothing mystical about communion. Christ was simply making a point that we must repent to God and accept His death that He paid for the forgiveness of our sins. That is the new covenant. There will not be another covenant. Christ left this sacrament (communion) so that we could proclaim what He has done for us. Communion physically ties us to a direct act of Christ and a way in which we can proclaim Christ. That is a great honor and blessing in itself.

[kinsman redeemer]

See also:

Jer 31:31-34,
2 Cor 3:4-6, and
Isa 61

Christians are now under the “New Covenant”

Previous covenants (Abrahamic and Davidic) are not removed but are considered two of three “streams” that come together with the New Covenant in the millennial kingdom ruled over by the Messiah.

[PeterPrinciple]

The New Covenant is the sacrifice of Christ for the forgiveness of sin verses the Old Covenant of living by the law of Moses.

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The proper question is what does God say on the matter?

He clearly defines it here:

Jer_31:33 “But this is the new covenant I will make with the people of Israel on that day,” says the LORD. “I will put My instructions deep within them, and I will write them on their hearts. I will be their God, and they will be My people.

and repeated here:

Heb_8:10 But this is the new covenant I will make with the people of Israel on that day, says the LORD: I will put My laws in their minds, and I will write them on their hearts. I will be their God, and they will be My people.

Now, doesn’t that explain why we must be born again and have God’s spirit living in us?

He destroyed the temple, priestly system and sacrificial system. no intermediates.

He wants a direct relationship with his chosen.