Unchained lyrics

I have been ungrateful And I have been unwise Restless from the cradle But now I realize It's so hard to see the rainbow Through glasses dark as these Maybe I'll be able From down on my knees Oh I am weak Oh I know I am vain Take this weight from me Let my spirit be unchained Old man swearin' at the sidewalk And I am overcome Seems that we've both forgotten Forgotten to go home Have I seen an angel Or have I seen a ghost Where's that rock of ages When you need it most It's so hard to see the rainbow Through glasses dark as these Maybe I'll be able From down on my knees