‎"Nature tends towards lighter things..."

Basically, there is a general rule in quantum theory that says: Left alone, a heavier thing will turn into a lighter thing if at all possible. It is not a hard concept to understand, really... A thing left alone cannot go to a heavier thing because there is no energy being added (remember mass = energy by E=mc^2), but there is always a chance a heavier thing can shed some energy and become lighter.

So we should all "lighten up" a little and help enlighten the world!