In many cases, we do not want people to know our past, especially those who are failing and hurting in the past. If we expose the old scars that seems the saddened and inglorious incidents would reveal and add more pain at the present. Therefore we would not like to show our pain.
However, in the case of disciple Thomas initially doubted that Jesus had risen from the dead. And Jesus asked him to put his hand into his side and checked his wounds. When Thomas saw those scars for himself and heard Christ’s amazing words, he was convinced that it was Jesus. He exclaimed in belief, “My Lord and my God!” Jesus then pronounced for those who haven’t seen Him or His physical wounds but still believe in Him: “Blessed are those who have not seen and yet have believed”.
The good news is that His scars were for our sins—our sins are against all of us. The death of Jesus is for the forgiveness of the sins of all who believe in Him and confess with Thomas, “My Lord and my God! So, when believing in Jesus, our sins are forgiven and we are new.