Hi, so I'll guess the context for this sentence.
"You're not in denial about where eighty puts you on the spectrum here"
Eighty is referring to the age of the person the author is addressing. The 'Spectrum' is life, and how close eighty is to death. Eighty is close to the end of your life.
He has used write, instead of wrote as the man is still actively writing, the reader is possibly watching him write.