Truth And Doing Well

Τοῦ ἁγίου Ἰουστίνου φιλοσόφου καὶ μάρτυρος ἐκ τοῦ ε' μέρους τῆς Ἀπολογίας αὐτοῦ. Τὸ εὐ πράττειν ἡγοῦσαι, ὦ ἄνδρες, οὐκ ἄλλο τι εἴναι ἤ τὸ κατὰ ἀλήθειαν ζῇν· τὸ δὲ εὖ ζῇν ἤ κατὰ ἀλήθειαν οὐκ ἄνευ τοῦ κατανοῆσαι τὴν τῶν πραγμάτων φύσιν. Ἅγιος Ἰουστίνος Source: Justini Martyris, Opera, Tom II

From the holy Justin, the philosopher and martyr, from the fifth part of his Apology: 'One cannot do well, O men, unless one lives according to the truth; and one cannot live according to the truth without the knowledge of the nature of things.' Saint Justin Martyr, Fragment