Notice first that in the picture by which, in Romans 7:1-4, Paul illustrates our deliverance from the Law, there is only one woman, while there are two husbands. The woman is in a very difficult position, for she can only be wife of one of the two, and unfortunately she is married to the less desirable one. Let us make no mistake, the man to whom she is married is a good man; but the trouble lies here, that the husband and wife are totally unsuited to one another. He is a most particular man, accurate to a degree; she on the other hand is decidedly easy-going. With him all is definite and precise; with her all is casual and haphazard. He wants everything just so, while she takes things as they come. How could there be happiness in such a home?
And then that husband is so exacting! He is always making demands upon her. And yet one cannot find fault with him, for as a husband he has a right to expect something of his wife; and besides, all his demands are perfectly legitimate. There is nothing wrong with the man and nothing wrong with his demands; the trouble is that he has the wrong kind of wife to carry them out. The two cannot get on at all; theirs are utterly incompatible natures. Thus the poor woman is in great distress. She is fully aware that she often makes mistakes, but living with such a husband it seems as though EVERYTHING she says and does is wrong! What hope is there for her? If only she were married to that other Man all would be well. He is no less exacting than her husband, but He also helps much. She would fain marry Him, but her husband is still alive. What can she do? She is "bound by law to the husband" and unless he dies she cannot legitimately marry that other Man.
The first husband is the Law; the second husband is Christ; and you are the woman. The law requires much, but offers no help in the carrying out of its requirements. The Lord Jesus requires just as much, yea more, but what He requires from us He Himself carries out in us. The law makes demands and leaves us helpless to fulfill them; Christ makes demands, but He Himself fulfills in us the very demands He makes. Little wonder that the woman desires to be freed from the first husband that she may marry that other Man! But her only hope of release is through the death of her first husband, and he holds on to life most tenaciously. Indeed there is not the least prospect of his passing away (see Matthew 5:18).
The law is going to continue for all eternity. If the Law will never pass away, then how can I ever be united to Christ? How can I marry a second husband if my first husband resolutely refuses to die? There is only one way out. If HE will not die, I can die, and if I die the marriage relationship is dissolved. And that is exactly Gods way of deliverance from the Law. The most important point to note in this section of Romans 7 is the transition from verse 3 to verse 4. Verses 1 to 3 show that the husband should die, but in verse 4 we see that in fact it is the woman who dies. The Law does not pass away, but I pass away, and by death I am freed from the Law.