The cup is more useful with a handle. I am more useful, too, when I allow in myself the grooves and ridges of my husband s different ideas and perceptions. I see better because of him. My usefulness increases, and together we are more useful to God. Sin, of course, makes a mess of things.
Sin is, for one thing, a preoccupation with self.
I see my spouse, home, church, work all as existing solely for my benefit. When I am crossed, someone has messed up big time. I want the world to be pleasant and convenient for me. But the flesh and blood God-Man had other ideas. He joined the human race and gave His life for us.