We do not see the image of God most profoundly in Adam and Eve as individuals, but in Adam and Eve as an intimate communion of persons. Here the sublime beauty and dignity of marriage and family life are unveiled! This is God’s original plan for marriage.
God’s Original Plan: An Explanation
When we say that we are created in the image of God, we do not mean simply that we resemble God in being persons endowed with intellect and free will. That is true, but the deeper imaging relates to our being created for communion with one another, mirroring God’s communion in the Trinity. There is no more profound human image of that communion than that of husband and wife.
From God’s Plan for Marriage and Family: A Study Guide of Familiaris Consortio
(Published by FAMILIA)