A wife of noble character is her husband's crown,
but a disgraceful wife is like decay in his bones.
I once heard someone say, "When your wife is for you, it doesn't matter if the rest of the world is against you. When your wife is against you, it doesn't matter if the rest of the world is for you." For some reason that stuck in my head. But this verse is a lot stronger than that simple platitude.
"Decay in his bones" is a pretty graphic description of how invasive marital disharmony is. It's not like you have a bad marriage but can shake it off when you go to work or when you are hanging out with friends or shut the front door of your house and go out into the world.
It gets inside you, it flavors your every thought, tempers your actions and attitude. On the converse, a wife of noble character is to be celebrated. I love that it doesn't say, "A wife of noble character should be treasured forever quietly in your heart."
Relating the wife to a crown feels like a very public declaration of her beauty. The husband isn't hiding the fact that he has a noble wife. If you walked around wearing a crown all day, it would be the first thing people see. You'd be proud of it and vocal about it. So if you have a wife of noble character, shout. Sing. Let your world see your crown.