Given the nature of my background it is very tough for me to be vulnerable. By that I mean, opening myself up to allow someone in, and to give myself completely to another.
And yet, my marriage depends on it.
I have made a commitment to Lucille. Part of that commitment is to give myself as a gift (I am slowly learning to see myself as one) and the other part is to receive the gift of her.
If I refuse to be vulnerable, our relationship will die. I will have essentially refused to give of myself to her, and refused to receive the gift of her.
The Lord works in mysterious ways, as He has put Lucille into my life and she understands this aspect of commitment. And a neat thing about that is, she understands my struggles with vulnerability and is very patient with me. She is always prayerfully supporting me as I struggle to learn.
Being vulnerable to me is an important part of the Sacrament of Marriage (CCC 1616, 1617). It is the opening of one's self completely to our spouse just as Christ did on the Cross. And therein lies one of the sources of Sacramental Grace.