Eternity, our soul will go on forever. The question is where will it go after death?
What does it mean to you that your soul will go on forever? Will it continue to develop in some way? Will it experience all possible things, forever being such a long time that this becomes possible? Will it experience anything at all? Will it go to a single place, or will it wander around? If so, will it have to avoid certain places?
Who do you believe will have their names written in the Book of the Life?
Given that I don't have any gods, I don't believe in the literal existence of such books.
In Judaism, and perhaps some Christian denominations, the Book of the Living contains the names of the righteous, I believe? The means of attaining righteousness would differ between the two religions, of course.
Then there is Chinese religion, where the Monkey King managed to get his name (and those of his fellow monkeys) erased from the Book of Death, thus gaining immortality. He proceeded to upset the serenity of the heavens with his pranks and acs of insubordination, and had to be subdued by the Buddha, who piled a mountain on him. So, eternity can be portrayed as a very lively place, by the traditions
I tend to focus on this life. There seem to be people around me (not here on this forum) who have frozen or even "dead" hearts (in the emotional sense, the affective sense) - no empathy, no compassion, no love, no joy. While I would not presume to judge them for what may be a condition of the psyche, I do sometimes wonder if such people aren't in a way on the "not quite alive" side of a hypothetical ledger.