Every kingdom divided against itself is brought to desolation, and every city or house divided against itself will not stand. Matthew 12:25
Hmmm... Divided we fall... United we stand. Our marriages and our families are included in that. A house can not be divided; because if it is, it will fall.
This doesn't mean that husband and wife agree on everything. There will be times when you just completely disagree. That does not mean that you can not be united.
To give an example from our own family, we have learned as a blended family that the show of solidarity is more important now than ever. We (Jeff and I) have to be on the same page with the kids. If not what ends up happening is the comedic "go ask your mother/go ask your father" and the children end up playing the game until they get the answer they want.
As parents, we have to communicate with each other so that we know what is going on with each child. We have to be on the same page and we have to show a united front. If there are disagreements, they are behind closed doors away from the kids.
As spouses, this comes into the "unequally yoked" clause. (2 Corinthians 6:14) The scripture specifies believers and unbelievers should not be yoked together. (married) I have also seen this scripture used in terms of the spouses have to be on the same page. It is difficult for people of different denominations to come together in agreement. I am not saying that it can not be done. I am saying that before one marries, there needs to be communication and understanding. Marriage is not to be taken lightly.
If you find yourself in marriage where you and your spouse are "divided", pray. Pray for the Lord to bring you the wisdom you need, pray for the Lord to open the eyes of your spouse. And most importantly, be open to what the Lord brings to you when you pray. Be willing to change yourself.