1 Brethren, my heart's desire and prayer to God for Israel is, that they might be saved.
2 For I bear them record that they have a zeal of God, but not according to knowledge.
3 For they being ignorant of God's righteousness, and going about to establish their own righteousness, have not submitted themselves unto the righteousness of God.
4 For Christ is the end of the law for righteousness to every one that believeth.
5 For Moses describeth the righteousness which is of the law, That the man which doeth those things shall live by them.
6 But the righteousness which is of faith speaketh on this wise, Say not in thine heart, Who shall ascend into heaven? (that is, to bring Christ down from above:)
7 Or, Who shall descend into the deep? (that is, to bring up Christ again from the dead.)
8 But what saith it? The word is nigh thee, even in thy mouth, and in thy heart: that is, the word of faith, which we preach;
9 That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved.
10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.
11 For the scripture saith, Whosoever believeth on him shall not be ashamed.
12 For there is no difference between the Jew and the Greek: for the same Lord over all is rich unto all that call upon him.
13 For whosoever shall call upon the name of the Lord shall be saved.
14 How then shall they call on him in whom they have not believed? and how shall they believe in him of whom they have not heard? and how shall they hear without a preacher?
15 And how shall they preach, except they be sent? as it is written, How beautiful are the feet of them that preach the gospel of peace, and bring glad tidings of good things!
16 But they have not all obeyed the gospel. For Esaias saith, Lord, who hath believed our report?
17 So then faith cometh by hearing, and hearing by the word of God.
18 But I say, Have they not heard? Yes verily, their sound went into all the earth, and their words unto the ends of the world.
19 But I say, Did not Israel know? First Moses saith, I will provoke you to jealousy by them that are no people, and by a foolish nation I will anger you.
20 But Esaias is very bold, and saith, I was found of them that sought me not; I was made manifest unto them that asked not after me.
21 But to Israel he saith, All day long I have stretched forth my hands unto a disobedient and gainsaying people.
11 “For this commandment which I command you this day is not too hard for you, neither is it far off. 12 It is not in heaven, that you should say, ‘Who will go up for us to heaven, and bring it to us, that we may hear it and do it?’ 13 Neither is it beyond the sea, that you should say, ‘Who will go over the sea for us, and bring it to us, that we may hear it and do it?’ 14 But the word is very near you; it is in your mouth and in your heart, so that you can do it.Deuteronomy 30:11-14 (RSV)
In this instance we see that Romans 10:4 is actually a corruption of Deuteronomy 30:11. The words have been changed to alter the meaning of the text. This is a very serious charge – but it is a consistent one (see Galatians 3):
5 Moses writes that the man who practices the righteousness which is based on the law shall live by it. 6 But the righteousness based on faith says, Do not say in your heart, “Who will ascend into heaven?” (that is, to bring Christ down) 7 or “Who will descend into the abyss?” (that is, to bring Christ up from the dead). 8 But what does it say? The word is near you, on your lips and in your heart (that is, the word of faith which we preach); 9 because, if you confess with your lips that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved.Romans 10:5-9 (ESV)
Above, Paul makes the statement that Christ is the Law. He says that the word is in your heart – for if you believe in your heart, you will be saved. Compare what Paul says above, to the actual verse in the Hebrew scriptures:
11 “For this commandment that I command you today is not too hard for you, neither is it far off. 12 It is not in heaven, that you should say, ‘Who will ascend to heaven for us and bring it to us, that we may hear it and do it?’ 13 Neither is it beyond the sea, that you should say, ‘Who will go over the sea for us and bring it to us, that we may hear it and do it?’ 14 But the word is very near you. It is in your mouth and in your heart, so that you can do it.Deuteronomy 30:11-14 (ESV)
In the actual passage, we are told that the commandments are not difficult to keep, and that they are not difficult to understand, nor are they unknown – but that they are known, and in your mouth, and in your heart – for the express purpose that you are actually able to do them. I.E. let no one say you cannot keep the law!
Paul cuts out the part where it says “the law is not too difficult for you,” and “so that you may do it.” and instead builds the case that Christ has done what the bible says we did not need to have done for us in the first place.