When the Torah speaks of ruach elokim we would have expected v'ruach ha'elokim, i.e. "the wind [spirit] of G-d."  The reason the Torah chose to omit the letter , thereby apparently identifying wind as something divine, is because of all matters in the physical universe wind is the closest to the invisible abstract force called G-d.  Even though in some respects fire is even more insubstantial than the wind, the Torah did not want to associate this word with G-d seeing that we described fire as a product of, or rather synonymous with, darkness.

"and the spirit [wind] of G-d hovered above the surface of the water" This is reference to the Torah which even at a time of the withdrawal of G-d's Presence (Shekinah), would never be totally forgotten by His people even when they are in exile.