μεγάλα ταῖς ἐλπίσι περινοέω → cherish great anticipations, form great projects
measureless: P. ἄμετρος, Ar. and V. ἀμέτρητος.
boundless: P. and V. ἄπειρος, Ar. and P. ἀπέραντος, V. μυρίος (also Plato but rare P.), Ar. and V. ἄβυσσος.
hard to understand: see inexplicable, obscure.