Romans 10:5-6, "For Moses writes about the righteousness which is of the law, “The man who does those things shall live by them.” But the righteousness of faith speaks.." You can be righteous either by doing the law or by speaking the Word. In keeping the righteousness of law, you are to observe to do all the commandments of God and if you break one, you've broken all. Nobody could really become righteous by keeping the law, hence Christ came fulfilled the law and ended it. Romans 10:4, "For Christ is the end of the law for righteousness to everyone who believes."
A new type of righteousness has been revealed, this is the righteousness of faith..all you need do to obtain this righteousness is to speak. Romans 10:8-10, "But what does it say? “The word is near you, in your mouth and in your heart” (that is, the word of faith which we preach): that if you confess with your mouth the Lord Jesus and believe in your heart that God has raised Him from the dead, you will be saved. For with the heart one believes unto righteousness, and with the mouth confession is made unto salvation." You get to be a Christian by speaking and you must keep speaking to enjoy the Christian life. Christians are talkers. Words brought you into the Kingdom of God, Words will sustain you. To live a victorious Christian life here on earth you must keep talking the Word of God. Find out what God says about you and keep talking, remember the Righteousness of faith speaks!