The Christian idea of marriage is based on Christ's words

Marriage is an act of will that signifies and involves a mutual gift, which unites the spouses and binds them to their eventual souls, with whom they make up a sole family, a domestic church. – Pope John Paul II

Gospel text: (MK 12:18-27)
Some Sadducees, who say there is no resurrection,
came to Jesus and put this question to him, saying,
“Teacher, Moses wrote for us,
If someone’s brother dies, leaving a wife but no child,
his brother must take the wife
and raise up descendants for his brother.
Now there were seven brothers.
The first married a woman and died, leaving no descendants.
So the second brother married her and died, leaving no descendants,
and the third likewise.
And the seven left no descendants.
Last of all the woman also died.
At the resurrection when they arise whose wife will she be?
For all seven had been married to her.”
Jesus said to them, “Are you not misled
because you do not know the Scriptures or the power of God?
When they rise from the dead,
they neither marry nor are given in marriage,
but they are like the angels in heaven.
As for the dead being raised,
have you not read in the Book of Moses,
in the passage about the bush, how God told him,
I am the God of Abraham, the God of Isaac,
and the God of Jacob?
He is not God of the dead but of the living.
You are greatly misled.”

It is no mistake that Jesus says to the Pharisees, and to many like them when speaking about the covenant of marriage, "You are greatly misled."

This age of convenience finds itself greatly misled by its own infidelities. The average person's understanding of marriage, if they allow the voices of egoism, consumerism, and the spirit of our times to inform them, will be profoundly distorted.

Marriage is about God. It is a sign of His covenant faithfulness to us. When your wife kisses you, when your husband holds you, when your spouse makes a decision to love you - you must realize that it is God wanting to love you through them. When you make a decision to serve your spouse, to go against the grain of your own selfish tendencies, you are making a decision to love God, to be faithful to Him.

The distortion of marriage is a distortion of God. It is an attack not only on some idea of the family that religious people have but an attack on God who is in His deepest identity a covenant of faithful love.

The Catechism of the Catholic Church speaks about marriage: "God who created man out of love also calls him to love the fundamental and innate vocation of every human being. For man is created in the image and likeness of God who is himself love. Since God created him man and woman, their mutual love becomes an image of the absolute and unfailing love with which God loves man. It is good, very good, in the Creator's eyes. And this love which God blesses is intended to be fruitful and to be realized in the common work of watching over creation: 'And God blessed them, and God said to them: 'Be fruitful and multiply, and fill the earth and subdue it.'"(1604)

God is the author of marriage. It is to Him we must look to understand it and to Him we must look when it is painfully attacked or breaks down.