John Murray, “Law and Grace:”
It is symptomatic of a pattern of thought current in many evangelical circles that the idea of keeping the commandments of God is not consonant with the liberty and spontaneity of the Christian man, that keeping the law has its affinities with legalism and with the principle of works rather than with the principle of grace. It is strange indeed that this kind of antipathy to the notion of keeping commandments should be entertained by any believer who is a serious student of the New Testament. Did not our Lord say, ‘If ye love me, ye will keep my commandments’ (John 14:15)? And did he not say, ‘If ye keep my commandments, ye shall abide in my love, even as I have kept my Father’s commandments and abide in his love’ (John 15:10)? It was John who recorded these sayings of our Lord and it was he, of all the disciples, who was mindful of the Lord’s teaching and example regarding iove, and reproduces that teaching so conspicuously in his first Epistle. We catch something of the tenderness of his entreaty when he writes, ‘Little children, let us not love in word, neither in tongue, but in deed and truth’ (I John 3:18), ‘Beloved, let us love one another, for love is of God” (I John 4:7). But the message oi John has escaped us if we have failed to note John’s emphasis upon the keeping of the commandments of God. ‘And by this we know that we know him, if we keep his commandments. He that says, I know him, and does not keep his commandments, is a liar, and the truth is not in him. But whoso keeps his word, in him verily the iove of God is made perfect’ (I John 2:3-5). ‘Beloved, if our heart does not condemn, we have confidence toward God, and whatsoever we ask we receive from him, because we keep his commandments and do those things that are well-pleasing in his sight . . . And he who keeps his commandments abides in him and he in him’ (I John 3:21, 22, 24). ‘For this is the love of God, that we keep his commandments’ (I John 5:3). If we are surprised to find this virtual identification of love to God and the keeping of his commandments, it is because we have overlooked the words of our Lord himself which John had remembered and learned well: ‘If ye keep my commandments, ye shall abide in my love’ (John 15:10) and ‘He that hath my commandments and keepeth them, he it is that loveth me’ (John 14:21). To say the very least, the witness of our Lord and the testimony of John are to the effect that there is indispensable complementation; love will be operative in the keeping of God’s commandments. It is only myopia that prevents us from seeing this, and when there is a persistent animosity to the notion of keeping commandments the only conclusion is that there is either gross ignorance or malignant opposition to the testimony of Jesus.
~originally a part of the Payton Lectures delivered by Professor Murray in March of 1955 at Fuller Theological Seminary. The entire lecture series was expanded and reprinted by Wm. B Eerdmans Publishing Co., Grand Rapids, Michigan in 1957 in book form with the title, Principles of Conduct: Aspects of Biblical Ethics by John Murray.
Read more of what John Murray has to say on how the law and the gospel interrelate here: http://www.the-highway.com/lawgrace.html