Because Jesus is not forever nailed to that cross. He was taken down and was burried and He rose again on the third day. If you worship a Jesus still nailed on a cross, your religion is incomplete. The EMPTY TOMB is the signature of God that declares our hope for deliverance from the clutches of sin. It is the ultimate symbol of the finished work of Christ. Without the resurrection, Calvary is just an ordinary Roman execution site and the cross is just another piece of wood.