The lyrics says "a wind", but is wind countable? I thought it should be "the wind", like the water, the air etc.
Wind is actually considered both a countable and uncountable noun. Even though you physically cannot count the wind, it is still both a countable and an uncountable noun. Countable examples of wind. Ex: The winds are very strong today. Ex: The winds off of the ocean brought a nice, cool breeze. Ex: Winds from storms can cause great damage. Uncountable examples of wind. Ex: The wind blew through the trees. Ex: The valley had many wind mills. Ex: Wind can be used as a renewable energy source.