Tilenus: posse non mori is of nature, non posse mori of glory
Tilenus says the same in his Disputation on the External State of the First Man, ninth thesis: "It should be understood that the first man's immortality was not wholly of the same kind as the glorious immortality of the blessed. For as being able not to sin is one thing and being unable to sin another, so being able not to die is one thing and being unable to die another. The first belongs to nature, the second to glory. The first kind of immortality removes the act of dying but does not rule out the power to die; the second abolishes and extinguishes both."
Latin
XXII. Tilenus quoque Disputatione de statu externo primi hominis thesi nona. Sciendum est, inquit, immortalitatem primi hominis non plane ejusdem fuisse rationis cum gloriosa Beatorum immortalitate. Nam ut aliud est posse non peccare, & non posse peccare: sic aliud posse non mori, & non posse mori. Illud est naturae, hoc gloriae. Prior immortalitas moriendi actum tollit, potestatem non excludit: posterior utrumque abolet & extinguit.