Sad, Sad Shadow (Lyrics)

I don't know why but somehow there came to be across my heart and on everything I see upon the earth and deep inside of me a sad, sad shadow It's not the way it's supposed to be I guess but I can't imagine otherwise I must confess tell me why I'm so full of emptiness and sad, sad shadow It's a secret I know I'll never find for what purpose am I so designed and what has cast across my heart and mind this sad, sad shadow