Your English text (and English in general, as we know it) will not be in use in 10,000 years.

There seems to be a widespread, almost instinctive desire to achieve permanence (works or monuments) in humans, which I do not fully understand. People want to make a dent on the universe, to be 'remembered as heroes' etc. Nothing lasts forever, not your works, not your memory. All will be lost in the mists of time.

I don't see this as a reason for nihilism either, you can make a difference with your efforts - it just won't last forever (or even 1,000 years, let alone 10,000). That's ok.