As Madeleine L'Engle once pointed out, there is a big difference between visible/invisible and seen/unseen. I believe that's why we don't see the kingdom of heaven though it is among us, and why Mrs. Peel is tippy-toe puffy-tail bouncing sideways across the room like a Halloween cat right now toward something I wouldn't know is there.
"We're behind the eight-ball,” says marine biologist Roger Hanlon, “if we think the world looks like how we see it. There's much more information there, and other animals see it very differently."
Here's why he said that:
Thank you, ScienceFriday.
Here endeth the lesson.
Or does it?