eternity

Eternity has generally been considered as divisible into two parts; which have been termed, eternity a parte ante, and eternity a parte post: that is, in plain English, that eternity which is past, and that eternity which is to come.

We sometimes speak of eternity in contradistinction to time; and often say, "through time and into eternity;" and again "from eternity to eternity," which is simply another form of expressing the same idea, and "pass through time into eternity." in other words, time is a short period allotted to man in his probationary state—and we use the word time in contradistinction to the word eternity, merely for the accommodation of man in his finite sphere, that we may comprehend and learn to measure periods.

Every niche was filled by a funeral urn, and by marble shapes that bent down in a pale eternity of sorrow.

It's been an eternity since we last saw each other.