Just as our purpose in general is to live so others would glorify God, our purpose in marriage is to live so our spouse glorifies God. Husbands and wives do this by showing Jesus to one another, but each in their own unique way.

Resources:

1 Peter 3:1-7

The Meaning of Marriage, Tim and Kathy Keller

The Council of Biblical Manhood and Womanhood

1 Peter, Baker Exegetical Commentary, Karen Jobes

1 Peter, New American Commentary, Tom Schreiner