τίς δ' οἶδεν εἰ τὸ ζῆν μέν ἐστι κατθανεῖν, τὸ κατθανεῖν δὲ ζῆν κάτω νομίζεται → who knows if life is death, and if in the underworld death is considered life
(μένω): always ἐμμενὲς αἰεί, continually ever.
ἐμμενές: (преимущ. ἐ. ἀεί Hom.) adv. постоянно, неустанно Hom.