Subject: What makes light 'go?' WHY does it 'travel?'

I understand the constant speed of light but I have never heard anyone address 
the question of WHY light "travels."  Does it have a motive force?  If not, 
how then does it move?  Why does it move?  What makes it "go?"  For that 
matter, what makes any of the elemental particles travel at whatever speed 
they do?

Dumb questions no doubt but if you can supply an answer I'd be most grateful.

Oh!  One more thing.  I understand light is both a particle and a wave.  
However, whenever I've seen light discussed as a wave it's "path" is always 
depicted as a sine wave... as if the photon is passing in front of an observer 
from left to right (or vice versa).  What do you suppose the photon's path 
might look like were it possible to detect its motion head on?  Might it be a 
spiraling path?  A spiral path whose dimension is exactly twice the diameter 
of the photon itself?  And if so, does it spiral clockwise or counterclockwise 
and, again if so, what effect might it contribute to known interference 
patterns?  I can think of no way to answer these questions.  Can you?

These are even dumber questions I suppose but any "light" you might shed on me 
will be both illuminating and gratifying.

Thank you.  

Re: What makes light 'go?' WHY does it 'travel?'