Eternity
Two Greek adjectives, both often rendered “eternal, ” actually differ sharply: aïdios means strictly endless or timeless; aiônios—from aiôn, “age” or “epoch” —means pertaining to an age, long-lasting, or belonging to the world to come. Scripture and most early Fathers reserve aïdios for divine life and bliss, never for punishment or fire. That lexical choice is deliberate and carries massive theological weight.