Imagine the scene:  you are sitting on the bank of a small river waiting for the sun to show it's face, as it does you see one single beam of light hit the rock wall and grass across from you.  It is one of those "awww" moments that photographers love.  The light was so pretty and so fleeting.  

See if you can find a single light beam touching something today, if there is no sun, try it with different types of light: a flashlight, a mirror or even your phone's light.