Why are homes for sale and houses for rent?

You can check the classifieds in any newspaper and find that homes are for sale and houses are for rent. I've always wondered about the difference. Can you drive through a neighborhood and distinguish a home from a house? They both have windows, doors, roofs and from the street, there's really no way to tell if someone is a homeowner or a tenant. In the past 40 years we have lived in six "houses" and six "homes". They all provided us with shelter and a place to put our furniture. You've probably heard the saying, "A house is made of bricks and stone, a home is made of love alone"...hmmmm. It's been my experience that it doesn't matter if you live in a house, or a home, it's the people who live inside that make the difference.