Contrast the famous appeal of Antigone in Soph., Ant. 454 to the eternal principles of right and wrong; οὐ γάρ τι νῦν γε καχθὲς, ἀλλ᾽ ἀεί ποτε ζῆ ταῦτα κοὐδεὶς οἶδεν ἐξ ὅτου ᾽φάνη.  The Christian saint can make the more personal reference to the ἀψευδὲς στόμα.