I really like this saying.
I heard it this weekend on a popular television show at the burial of one of the characters.
"What you see is temporal; what you don't see is eternal."
Everyday, we think we are living in the "real world," but this is just our mortal experience, one constrained by our senses and the dictates of time and space.
However, beyond this mere earthly experience and existence is the eternal G-d.
Perhaps, we can take comfort and live a life of meaning, if our existence in the temporal world is always with the eternal in mind. ;-)
(Source Photo: here with attribution to Terry Dennis)