Every person born into this world has a natural right to sustain, preserve, and defend his own life to the best of his ability.
Natural ragione è di ciascuno che ci nasce, la sua vita, quanto può, aiutare e conservare e difendere.
Original text (Italian)
Notes from Wikiquote
It is the natural instinct of every creature that is born, to foster, preserve and defend his own life. (tr. Harbottle and Dalbiac)