All who are depending upon their own obedience to the Law are under a curse, for it is written, "Cursed is every one who does not remain faithful to all the precepts of the Law, and practise them."
It is evident, too, that no one can find acceptance with God simply by obeying the Law, because "the righteous shall live by faith,"
and the Law has nothing to do with faith. It teaches that "he who does these things shall live by doing them."
Christ has purchased our freedom from the curse of the Law by becoming accursed for us--because "Cursed is every one who is hanged upon a tree."
Our freedom has been thus purchased in order that in Christ Jesus the blessing belonging to Abraham may come upon the nations, so that through faith we may receive the promised Spirit.
Brethren, even a covenant made by a man--to borrow an illustration from daily life--when once formally sanctioned is not liable to be set aside or added to.
(Now the promises were given to Abraham and to his seed. God did not say "and to seeds," as if speaking of many, but "and to your seed," since He spoke of only one--and this is Christ.)
I mean that the Covenant which God had already formally made is not abrogated by the Law which was given four hundred and thirty years later--so as to annul the promise.
For if the inheritance comes through obedience to Law, it no longer comes because of a promise. But, as a matter of fact, God has granted it to Abraham in fulfilment of a promise.
Why then was the Law given? It was imposed later on for the sake of defining sin, until the seed should come to whom God had made the promise; and its details were laid down by a mediator with the help of angels.
But there cannot be a mediator where only one individual is concerned.