Frequently we do not leave the past behind. We clasp on to it. We dissect it, and let fears for the future, tempered by the past, unconsciously prevent us from taking up the task eternal.
~ from EXPLORING CELTIC SPIRITUALITY by Ray Simpson
What do we call visible light? We call it color. But the electromagnetic spectrum runs to zero in one direction and infinity in the other, so really, children, mathematically, all of light is invisible.