The Origin of the Cross goes back to Adam. When Adam became ill, he sent his son Seth to find some medicine to heal him. Seth went to an area near the Garden of Eden. There he approached an Angel guarding the gate to Paradise. Seth told him his father was dying and pleaded with the Angel to help him. The Angel broke off
a limb from the tree from which Adam had eaten of the forbidden fruit, even after God the Father had forbidden him and Eve to do so. The Angel handed the branch to Seth and with that he said, Your father will be healed when this branch bears fruit. Saint Anthony writes that the preface of the Mass of the Feast of the Discovery of the Cross, made a reference to this occurrence:
"The tree of man’s defeat became his tree of victory. Where life was lost, there life has been restored."