What can you see? In broad daylight you would never be able to see the depths of the Canyon, not because they are not there, but because you cannot see them when there is light. I don't mean that they aren't visible. What I mean is that you do not see the depths because there is too much light. You see other details in the cliffs and rocks and cannot see the huge abyss lying at your feet. Like life, you don't appreciate the light until you have seen the darkness.