‘all’; the way to Salvation. Is that 'gained' by the Law then? No, it is by 'faith'. The 'inheritance', which means to be 'joint-heirs with Christ', will not be given to us if we seek to be justified by The Law .

 

Rom.4; 8; Blessed is the man to whom the lord will not impute sin.

 

Titus 3:7; That being justified by his grace, we should be made heirs according to the hope of eternal life.

 

Heb.6:17;  Wherein God, willing more abundantly to shew unto the heirs of promise the immutability of His council, confirmed it by an oath.

 

That we are justified by 'faith' in Jesus Christ, and not through following The Law, is still the heart of Paul's Message here in Galatians.

 

Gal 3:19   Wherefore then serveth the law? It was added because of transgressions, till the seed should come to whom the promise was made; and it was ordained by angels in the hand of a mediator.

     So why did GOD give us His Law through His prophet Moses, the 'mediator' of this verse?   Today, Jesus Christ is our Mediator Who we must go through to our Father Yehovah.

 The 'veil' of The Temple was torn in two from top to bottom (rent) when Jesus Christ died on the cross. That means our 'faith' in Christ needs no man, no system of man, none but Christ, for us to speak to our Father in Heaven. Have you talked to Him lately, through His Son Jesus Christ?
     Before Jesus Christ came in the flesh, there was only a 'hope' towards His coming and the offer of Salvation. God's Law was given at that time to help those 'point the Way' of Christ. Can you imagine how much worse man's state would be today, if GOD had not given us His Law also?  We are to use it as a 'Guide', but It will never replace Salvation through Christ, GOD's Promise.

 

Gal 3:20   Now a mediator is not a mediator of one, but God is one.

     
A mediator by itself is no 'go-between' of itself.  But Jesus Christ is Immanuel 'God with us', and He is our Mediator to The Father.

 

Isa.7:14; Therefore the Lord Himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel.

 

Matt.1:23; Behold, a virgin shall be with child, and shall bring forth a Son, and they shall call his name Emmanuel, which being interpreted is, God with us.

 

Gal 3:21   Is the law then against the promises of God? God forbid: for if there had been a law given which could have given life, verily righteousness should have been by the law.

     
Well since Christ came and died on the cross to offer all Salvation, then does The Law conflict with Salvation?  Paul's saying that if we were given a Law which could give us eternal Salvation, then Christ wouldn't have needed to die on the cross for us.   So we are to understand that The Law and the Promise of Salvation are two different operations.
     Let me put it this way. When Christ comes into His Kingdom upon this earth, on His future Advent, as written in Rev.20 and many other places in Scripture, what will He use to hand out righteous Judgment?  Every King has a Law of the land to rule by. Which one will Christ, our True KING use?

 

The last nine Chapters of Ezekiel: Read All.