Are all mankind - without exception - stained by personal sin? How would the unborn, infants or the mentally ill be guilty of sin? What about the Blessed Virgin Mary? Can someone be free from Original Sin at conception? Is there any Biblical foundation for this?

Why does the Church hold this to be true?  Why is it necessary for Mary to be immaculate at all?  Raymond de Souza engages the issue with a wealth of Biblical references and pure logic.  Find out how it makes perfect sense for God Our Lord to have preserved the Blessed Virgin Mary from the stain of Original Sin.