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.
~ Anthony Doerr in ALL THE LIGHT WE CANNOT SEE
When each day is sacred
When each hour is sacred
When each instant is sacred
Earth and you, space and you
hearing the sacred through time
You'll reach the fields of light.