Lyric discussion by ChrisEvans 

Cover art for Jerusalem lyrics by Emerson, Lake & Palmer

I tend to think ELP is always taking influence and reconstructs for interpretation. Seeing the inspiration behind these lyrics and Lake's singing shows how an individual would ponder light, nature, and Godliness once seen in land and can it ever be seen again against such eternal darkness or "satanic mills". With obvious tones of Christian imagery it leads to uplifting "I Will not cease from mental fight" which is classic "progressive" motives in that man, in seek of life and direction, ultimately determines that we will continue to forever on strive for light until success of obtaining and reflecting it truly in unison with perfect life. A beautiful grasp on life with sparkles of Christianity.

My Interpretation