While it is true that born again believers are not saved by obeying the Law, we maintain fellowship with God and with our fellow believers by living our lives by the principles of His Law (1 Jn. 1:1-10). Although the last five Commandments which address how we are to relate to our neighbor are stated in the negative, the New Testament defines and restates them in a very positive fashion. Matthew wrote:
"Jesus said unto him, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind. This is the first and great commandment. And the second is like unto it, Thou shalt love thy neighbour as thyself. On these two commandments hang all the law and the prophets" (Matt.22:37-40).The Apostle Paul wrote the same thing, but condensed it into one:
"For, brethren, ye have been called unto liberty; only use not liberty for an occasion to the flesh, but by love serve one another. For all the law is fulfilled in one word, even in this; Thou shalt love thy neighbour as thyself" (Gal. 5:13-14).
Apart from the indwelling of the Holy Spirit, the Christian cannot even keep this one thing God desires for us. Paul wrote, "For I know that in me, that is, in my flesh, dwelleth no good thing: for to will is present with me; but how to perform that which is good, I find not" (Rom. 7:18). As believers, we need the Holy Spirit to fill us so that we are able to express His nature in our relationship with others (Eph. 5:17-21). Being filled, or "walking in the Spirit" (Gal. 5:25), allows God to show forth the fruit of the Spirit in our lives (Gal. 5:22-23). "Love worketh no ill to his neighbour: therefore love is the fulfilling of the law" (Rom. 13:10).