that they would still want to consider themselves bound by this treaty?
Around 50 C.E. there were people in the Christian congregations that were pushing for a mandatory keeping of parts of the Law. But their motive was self-serving.
"All those who want to make a good impression in the flesh (or "who want to look good outwardly.") are the ones who try to compel you to get circumcised, doing so only to avoid being persecuted for the torture stake of the Christ. For even those who are getting circumcised do not keep the Law themselves, but they want you to be circumcised so that they may have a cause for boasting about your flesh." - Galatians 6:12-13
If though a Christian worships the same God under a different arrangement, and sees that God as a Person with his own value system, then the Law remains of much value. The Law may not be binding, but the Law is based on principles that have not changed. The Law also was so complete in setting a high standard of morality that no man could attempt to follow it completely without realizing that it is impossible not to be personally convicted by it. It encouraged those living by it to recognize how pitiful our condition as imperfect is. Deserving of death, we need someone to pay our debt we cannot otherwise avoid.
Hear this all you peoples.
Pay attention, all you inhabitants of the world, (or "system of things.")
...
None of them can ever redeem a brother
Or give to God a ransom for him,
(The ransom (or "redemption.") price for their life (or "soul.") is so precious
That it is always beyond their reach);
That he should live forever and not see the pit. (or "grave.")
...
Their inner wish is that their houses will last forever,
Their tents to generation after generation.
They have named their estates after themselves.
But man, although honored, will not remain;
He is no better than the beasts that perish.
...
They are assigned like sheep to the Grave. (or "Sheol.")
Death will shepherd them;
The upright will rule over them in the morning.
Every trace of them will fade away;
The Grave rather than a palace will be their home.
But God will redeem me (or "my soul.") from the power (lit. "hand.") of the Grave,
For he will take hold of me.
- Psalms 49:1; Psalms 49:7-9; Psalms 49:11-12; Psalms 49:14-15