From the Gospel according to Mark
Mark 7:14-23

Jesus summoned the crowd again and said to them,
“Hear me, all of you, and understand.
Nothing that enters one from outside can defile that person;
but the things that come out from within are what defile.”

When he got home away from the crowd
his disciples questioned him about the parable.
He said to them,
“Are even you likewise without understanding?
Do you not realize that everything
that goes into a person from outside cannot defile,
since it enters not the heart but the stomach
and passes out into the latrine?”
(Thus he declared all foods clean.)
“But what comes out of the man, that is what defiles him.
From within the man, from his heart,
come evil thoughts, unchastity, theft, murder,
adultery, greed, malice, deceit,
licentiousness, envy, blasphemy, arrogance, folly.
All these evils come from within and they defile.”

You are my treasure.

Yes, the origin or cause of my sorrows is not external, it is not in my husband but in my heart. It is there where I make interpretations, it is from there that my intentionality arises. It is there where I sanctify myself. In my heart. Therefore, it is my heart that I must heal if I want to love and/or want to be holy.
The heart is the most precious thing that God has given me because it allows me to love you, but it is also the most dangerous because it is disordered, and I can also hate you. Therefore, I must purify it by eliminating self-love so I can truly love, so that: For a Christian, the treasure is the other. 

Applied to married life:
 
Lorena: I have been in love with the Lord for a long time, but now I can truly say that it is not a passionate love, but a sincere love, because my heart is with you, Marino.
Marino: And what new experience are you living in your heart that allows you to say that your heart is with me, Lorena?
Lorena: Well, you have become my treasure. Now my treasure is you, and this is how I experience you. Don’t you notice?
Marino: Yes, I can feel how you care for me. I thought it was just my birthday gift.
Lorena: Hahaha. No, silly. Now it’s for real. My treasure is you, above anything else, any book, any prayer, any experience I live inside. My treasure is you. I’m glad you notice because that means my experience is true, and my love for God is true. 

Mother,

I love my husband/wife with all my heart and I give myself completely to him/her. My heart is set on him/her, and this is my way of telling the Lord: “I love You.” Blessed and loved be You forever.