‘Don’t be too nice to your wife:
don’t tell her every plan you think up
tell her one thing and leave another one hidden’
‘τῶ νῦν μή ποτε καὶ σὺ γυναικί περ ἤπιος εἶναι
μηδ’ οἱ μῦθον ἅπαντα πιφαυσκέμεν, ὅν κ’ ἐ¿ εἰδῇς,
ἀλλὰ τὸ μὲν φάσθαι, τὸ δὲ καὶ κεκρυμμένον εἶναι.
So goes dead Agamemnon’s advice to the living Odysseus (at least, according to Odysseus….)