πιστευτικῶς

From LSJ

νεκρὸν ἐάν ποτ' ἴδηις καὶ μνήματα κωφὰ παράγηις κοινὸν ἔσοπτρον ὁρᾶις· ὁ θανὼν οὕτως προσεδόκα → whenever you see a body dead, or pass by silent tombs, you look into the mirror of all men's destiny: the dead man expected nothing else | if you ever see a corpse or walk by quiet graves, that's when you look into the mirror we all share: the dead expected this

Source

Russian (Dvoretsky)

πιστευτικῶς: доверчиво, уверенно: π. ἔχειν τινί Plat. быть уверенным в чем-л.