Romans 10:1-5 (NASB)
[SUP]4 [/SUP] For Christ is the end of the law for righteousness to everyone who believes.
DEUT. 30 [10] If thou shalt hearken unto the voice of the Lord thy God, to
KEEP HIS COMMANDMENTS and his statutes which are written in this book of the law, and if thou turn unto the Lord thy God with all thine heart, and with all thy soul. [11] For this commandment which I command thee this day, it is not hidden from thee, neither is it far off. [12] It is not in heaven, that thou shouldest say, WHO SHALL GO UP FOR US TO HEAVEN, and bring it unto us, that we may hear it, and do it? [13] Neither is it beyond the sea, that thou shouldest say, Who shall go over the sea for us, and bring it unto us, that we may hear it, and do it? [14] But
THE WORD IS VERY NIGH UNTO THEE, in thy mouth, and in thy heart, that thou mayest do it.
Israel was told they were to keep Gods 10 commandments. The Word is nigh
ROMANS 10 [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;
The Word is nigh. But Israel was ignorant at the time that they could not attain Gods righteousness by keeping the law. They did not know that Christ was the end of the law for righteousness. No matter how well they kept the 10 commandments they would fall short and be as filthy rags. The bottom line is that we as believers are still to keep Gods 10 commandments but its only by grace through faith in the shed blood of Christ that we are made righteous. His blood alone washes us clean from our short comings in keeping His law. Christ is the end of the law for righteousness.
EZEKIEL 33 [13] When I shall say to the righteous, that he shall surely live; IF HE TRUST TO HIS OWN RIGHTEOUSNESS, and commit iniquity, all his righteousnesses shall not be remembered; but for his iniquity that he hath committed, HE SHALL DIE for it. [14] Again, when I say unto the wicked, Thou shalt surely die; IF HE TURN FROM HIS SIN, AND DO THAT WHICH IS LAWFUL and right; [15] If the wicked restore the pledge, give again that he had robbed, walk in the statutes of life, without committing iniquity; he shall surely live, HE SHALL NOT DIE. [16] None of his sins that he hath committed shall be mentioned unto him: HE HATH DONE THAT WHICH IS LAWFUL AND RIGHT; HE SHALL SURELY LIVE.
Its explained more fully in Ezek.33. We are to observe to keep Gods law but we must not trust in it as a means of attaining true righteousness. Christ is the end of the law for righteousness because we will all fall short in keeping the law. Its ONLY by the blood of Christ and His grace that we shall become righteous.
ROMANS 5 [19] For as by one man's disobedience many were made sinners, so by the obedience of one shall many be made righteous. [20] Moreover the law entered, that the offence might abound. But where sin abounded, grace did much more abound: [21] That as SIN HATH REIGNED UNTO DEATH, even so might GRACE REIGN THROUGH RIGHTEOUSNESS UNTO ETERNAL LIFE by Jesus Christ our Lord.
yup