Yes Chris, "Sinner" is a great song!
I love the lyrics:
"Under moonlight I stood wild and naked
Felt no shame just my spirit awakened"
For some reason I think of Neil having this epiphany or mystical experience, though I have no idea if the meaning is really that deep.
My favorite memory of the song is when Neil performed it in Minneapolis and he was facing the Basilica Catholic church. He was singing the song just beaming. He also told some stories of his alter boy days. He seemed to get a real kick out of the fact he was playing on the grounds of a Catholic church!