When you see any one weeping for grief, either that his son has gone abroad, or that he has suffered in his affairs, take care not to be overcome by the apparent evil; but discriminate, and be ready to say, “What hurts this man is not this occurrence itself,—for another man might not be hurt by it,—but the view he chooses to take of it.” As far as conversation goes, however, do not disdain to accommodate yourself to him, and if need be, to groan with him. Take heed, however, not to groan inwardly too.
ὅταν κλαίοντα ἴδῃς τινὰ ἐν πένθει ἢ ἀποδημοῦντος τέκνου ἢ ἀπολωλεκότα τὰ ἑαυτοῦ, πρόσεχε μή σε ἡ φαντασία συναρπάσῃ ὡς ἐν κακοῖς ὄντος αὐτοῦ τοῖς ἐκτός, ἀλλʼ εὐθὺς ἔστω πρόχειρον ὅτι “τοῦτον θλίβει οὐ τὸ συμβεβηκός (ἄλλον γὰρ οὐ θλίβει), ἀλλὰ τὸ δόγμα τὸ περὶ τούτου.” μέχρι μέντοι λόγου μὴ ὄκνει συμπεριφέρεσθαι αὐτῷ, κἂν οὕτω τύχῃ, καὶ συνεπιστενάξαι· πρόσεχε μέντοι μὴ καὶ ἔσωθεν στενάξῃς.
Enchiridion 16