sleepcannot+be+photographed

__sleep cannot be photographed__
This is the third description of love.

Sleep is something that cannot be photographed. One's dreams and thoughts cannot be captured in an exact reflection. This makes love somewhat imaginary. A sense that is beyond human ability to capture. Humans can capture images, animals, land, but to capture love is as impossible as taking a picture of a dream.

The first two descriptions are: Love does not forget and love can die.