Philo, The Worse Attack the Better 206
“When some musician or scholar has died, then their music or writing dies with them; but their basic contributions persist and, in some way, live as long as the universe does. Those who are scholars and musicians now or who will be in the future will continue to develop thanks to these previous works in an undying procession.
In the same way, whatever is prudent, wise, brave, just, or just simply wise in an individual may perish, but it nevertheless remains as immortal thought and all excellence is safeguarded against decay in the immortal nature of the whole [universe]. Through this advantage people today and those of tomorrow will also become civilized—unless we believe that the death of one individual person in turn visits ruin upon humankind.”
ὥσπερ γὰρ μουσικοῦ τινος ἢ γραμματικοῦ τελευτήσαντος ἡ μὲν ἐν | τοῖς ἀνδράσι μουσικὴ καὶ γραμματικὴ συνέφθαρται, αἱ δὲ τούτων ἰδέαι μένουσι καὶ τρόπον τινὰ βιοῦσιν ἰσοχρόνιοι τῷ κόσμῳ, καθ᾿ ἃς οἵ τε ὄντες καὶ οἱ μέλλοντες διαδοχαῖς ταῖς εἰσαεὶ μουσικοί τε καὶ γραμματικοὶ γενήσονται, οὕτως καὶ τὸ ἔν τινι φρόνιμον ἢ σῶφρον ἢ ἀνδρεῖον ἢ δίκαιον ἢ συνόλως σοφὸν ἂν ἀναιρεθῇ, οὐδὲν ἧττον ἐν τῇ τοῦ παντὸς ἀθανάτῳ φύσει φρόνησις ἀθάνατος καὶ ἀρετὴ σύμπασα ἄφθαρτος ἐστηλίτευται, καθ᾿ ἣν καὶ νῦν εἰσιν ἀστεῖοί τινες καὶ αὖθις γενήσονται· εἰ μὴ καὶ ἀνθρώπου τινὸς τῶν ἐν μέρει θάνατον φθορὰν ἐργάσασθαι φήσομεν ἀνθρωπότητι
Consider other religious traditions on this:
“Saving One Life Is As If Saving Whole Of Humanity…”
“Whoever destroys a soul [of Israel], it is considered as if he destroyed an entire world. And whoever saves a life of Israel, it is considered as if he saved an entire world.”