Lyric discussion by Joeknob11 

Cover art for Adia lyrics by Sarah McLachlan

Sarah is an Irish Canadian, if I'm not mistaken. "Adia" could be a phoentic spelling of the Gaelic "a dhia", which means "Oh God" in English. So the lyrics of this song could actually be meant to address God directly. She is apologizing to God for failing in life and questioning the Catholic belief in original sin. ( We are born innocent).

Positive
Subjective
Thoughtful
Religious
Apology
Innocence
Questioning
Life