We can never hear what we've always heard. Only with absence and return can we possibly determine its sound. I feel our lives are like this. Much of the world/universe that we are born into is invisible to us in many ways because it has always been here with us. We only notice the changes and not the constant. We are held so long that we can't feel it anymore and think we are alone. We are not alone.
I cannot hear the sun, but I know she is singing.