Relics in scripture:
“And God did extraordinary miracles by the hands of Paul, so that handkerchiefs or aprons were carried away from his body to the sick, and diseases left them and the evil spirits came out of them” (Acts 19:11-12).
The guy whose comment has now been removed by the moderator on why JPII’s hat could not cure himself of his ailment, is like the thief who cursed the Christ for not being able to come down from the cross and heal them all. Relics have their “spiritual and physical power” precisely because they come from someone who lived and died for Christ. Sainthood by the Church is simply an external act of affirmation that the deceased man or woman is in paradise.