I like washing dishes. I like taking a dirty filthy dish and soaping it down. As you scrub the soap you feel the dirt and grime coming off, but there is no proof. The dirty food and water collect in the bottom of the dish and you have to trust. You have no proof the dish is looking better. You can not see the suds.
And then you turn on the water. You pick up the dish. And you run it under the water. Slowly at first and then faster the suds, dirt, and food wash away. Before you is a dish. It is slick with clean water. Now you turn the water to cold and feel the cold water rush around your hands and through the bowl. Have you noticed how things feel better cold and wet?
So has the love of the Lord washed us. So that we can be as white as snow and beautiful to his eyes.