Endings

What is it about endings that make them so sad? Now, I realize that this could be construed as a rather silly question, endings are sad, simply because it is the end. But I want to look a little more deeply into exactly what it is that leaves you feeling so empty at the end of a movie, or a book, or possibly even certain stages of our lives. We hear the cliche, yet somewhat true sayings all the time such as, "Every ending is a new beginning,", or "When one door closes, another one opens." I think the idea of these statements is just to console or maybe open someones perspective, but I don't think they take away the sadness of it. Yes, a new beginning is exciting and exhilarating, but it doesn't take away the loneliness of missing the past. As humans, we're creatures of habit, we like things to stay the same, we're comfortable keeping things how they are. Endings are closely tied to ones capability and desire to change or not to change. I will have to confess, that endings to me are very sad. But thinking for a moment, what if we didn't have endings? What if life was in one constant, continuous stage that never changed, therefore giving you no beginnings and no endings? Wouldn't that be an even greater loss and sadness? I think most agree that it would. So with endings, they are often bitter-sweet in a way that few things are, but they are essential for us to enjoy some of the greatest experiences.