228. In some cases, one of the spouses is not baptized or does not want to practice the faith. This can make the other’s desire to live and grow in the Christian life difficult and at times painful. Still, some common values can be found and these can be shared and relished. In any event, showing love for a spouse who is not a believer, bestowing happiness, soothing hurts and sharing life together represents a true path of sanctification. Love is always a gift of God. Wherever it is poured out, it makes its transforming presence felt, often in mysterious ways, even to the point that “the unbelieving husband is consecrated through his wife, and the unbelieving wife is consecrated through her husband” (1 Cor 7:14).
Seeking common values: at the very least there is a commitment to love. The goal, the goodness to be sought is a sanctification. None of us are completely holy in this life. It seems we are all on some path of development, whether we realize it or not.
For your reference Amoris Laetitia is online here.