εἰ δὲ τύχῃ τις ἔρδων, μελίφρον' αἰτίαν ῥοαῖσι Μοισᾶν ἐνέβαλε → if someone is successful in his deeds, he casts a cause for sweet thoughts into the streams of the Muses
Of looks, etc.: P. and V. σκυθρωπός, V. στυγνός, συνωφρυωμένος.
look pensive: V. πεφροντικὸς βλέπειν.