I have in my collection of quotes a beautiful saying of St. Augustine in Latin : MORS MORTIS MORTEM MORTI NON VINCISSET, JANUA ETERNA MANCISET CLAUSA , that is, If the death of death (Jesus )did not conquer death in death, the eternal doors would have remained closed. Since I have been quoting this saying on different occasions, I would like to know if the saying in Latin is correctly worded and spelt.
Can someone with good knowledge of Latin help ?