Romans 7, note 4, we are married to Christ, so we are the bride of Christ.
Even when plainly written, some will not believe.
Or do you not know, brethren (for I speak to those who know the law), that the law [
a]has dominion over a man as long as he lives? 2 For the woman who has a husband is bound by the law to
her husband as long as he lives. But if the husband dies, she is released from the law of
her husband. 3 So then if, while
her husband lives, she marries another man, she will be called an adulteress; but if her husband dies, she is free from that law, so that she is no adulteress, though she has married another man.
4
Therefore, my brethren, you also have become dead to the law through the body of Christ, that you may be married to another—to Him who was raised from the dead, that we should bear fruit to God.
5 For when we were in the flesh, the sinful passions which were aroused by the law were at work in our members to bear fruit to death. 6 But now we have been delivered from the law, having died to what we were held by, so that we should serve in the newness of the Spirit and not
in the oldness of the letter.
Paul makes the comparison of a marriage between a man and a woman to be like Christ and His church, and Paul calls this a great mystery.
Ephesians 5
Marriage—Christ and the Church
22 Wives, submit to your own husbands, as to the Lord. 23 For the husband is head of the wife, as also Christ is head of the church; and He is the Savior of the body. 24 Therefore, just as the church is subject to Christ, so
let the wives
be to their own husbands in everything.
25 Husbands, love your wives, just as Christ also loved the church and gave Himself for her, 26 that He might [
g]sanctify and cleanse her with the washing of water by the word, 27 that He might present her to Himself a glorious church, not having spot or wrinkle or any such thing, but that she should be holy and without blemish. 28 So husbands ought to love their own wives as their own bodies; he who loves his wife loves himself. 29 For no one ever hated his own flesh, but nourishes and cherishes it, just as the Lord
does the church. 30 For we are members of His body, [
h]of His flesh and of His bones. 31 “For this reason a man shall leave his father and mother and be joined to his wife, and the two shall become one flesh.” 32 This is a great mystery, but I speak concerning Christ and the church. 33 Nevertheless let each one of you in particular so love his own wife as himself, and let the wife
see that she respects
her husband.