1 Peter 3:7
7. Likewise, ye husbands, dwell with them according to knowledge, giving honour unto the wife, as unto the weaker vessel, and as being heirs together of the grace of life; that your prayers be not hindered.
7. Viri similiter cohabitent secundum scientiam, tanquam infirmiori vasi, muliebri impertientes honorem, tanquam etiam cohaeredes gratiae vitae (vel, multiplicis gratiae et vitae,) ne preces vestrae interrumpantur.
7 Likewise, ye husbands, dwell with them. From husbands he requires prudence; for dominion over their wives is not given them, except on this condition, that they exercise authority prudently. Then let husbands remember that they need prudence to do rightly their duty. And doubtless many foolish things must be endured by them, many unpleasant things must be borne with; and they must at the same time beware lest their indulgence should foster folly. Hence the admonition of Peter is not in vain, that the husbands ought to cohabit with them as with a weaker vessel. Part of the prudence which he mentions, is, that the husbands honor their wives. For nothing destroys the friendship of life more than contempt; nor can we really love any but those whom we esteem; for love must be connected with respect.
Moreover, he employs a twofold argument, in order to persuade husbands to treat their wives honourably and kindly. The first is derived from the weakness of the sex; the other, from the honor with which God favors them. These things seem indeed to be in a manner contrary, — that honor ought to be given to wives, because they are weak, and because they excel; but these things well agree together where love exists. It is evident, that God is despised in his gifts, except we honor those on whom he has conferred any excellency. But when we consider that we are members of the same body, we learn to bear with one another, and mutually to cover our infirmities. This is what Paul means when he says that greater honor is given to the weaker members, (1 Corinthians 12:23;) even because we are more careful in protecting them from shame. Then Peter does not without reason command that women should be cared for, and that they should be honored with a kind treatment, because they are weak. And then as we more easily forgive children, when they offend through inexperience of age; so the weakness of the female sex ought to make us not to be too rigid and severe towards our wives.
The word vessel, as it is well known, means in Scripture any sort of instrument.
Being heirs together (or co-heirs) of the grace of life Some copies have "of manifold grace;" others, instead of "life," have the word "living." Some read "co-heirs" in the dative case, which makes no difference in the sense. A conjunction is put by others between manifold grace and life; which reading is the most suitable.  For since the Lord is pleased to bestow in common on husbands and wives the same graces, he invites them to seek an equality in them; and we know that those graces are manifold in which wives are partakers with their husbands. For some belong to the present life, and some to God's spiritual kingdom. He afterwards adds, that they are co-heirs also of life, which is the chief thing. And though some are strangers to the hope of salvation, yet as it is offered by the Lord to them no less than to their husbands, it is a sufficient honor to the sex.
That your prayers be not hindered For God cannot be rightly called upon, unless our minds be calm and peaceable. Among strifes and contentions there is no place for prayer. Peter indeed addresses the husband and the wife, when he bids them to be at peace one with another, so that they might with one mind pray to God. But we may hence gather a general doctrine — that no one ought to come to God except he is united to his brethren. Then as this reason ought to restrain all domestic quarrels and strifes, in order that each one of the family may pray to God; so in common life it ought to be as it were a bridle to check all contentions. For we are more than insane, if we knowingly and wilfully close up the way to God's presence by prayer, since this is the only asylum of our salvation.
Some give this explanation, that an intercourse with the wife ought to be sparing and temperate, lest too much indulgence in this respect should prevent attention to prayer, according to that saying of Paul,
"Defraud not one another, unless by consent for a time, that ye may give yourselves to fasting and prayer." (1 Corinthians 7:5.)
But the doctrine of Peter extends wider: and then Paul does not mean that prayers are interrupted by mutual cohabitation. Therefore the explanation which I have given ought to be retained.
 The received text is the most approved, and there is no different reading of any importance. -- Ed.