How can you tell if you are really sick or just not wanting to go to work?

I can't tell...

i mean i know i feel like ass. SOmebody elses flacid ass. But i have the feeling that if i wanted to, i could power on through.

but then there are those times, when you think - fuck it i gotta go into work today - and then you are all sweaty and headrushy on the train and think how short life is, and how irrelevant one more day will be at the office for everyone else there but you and thats only because you feel like shit.

i know work isn't allll pointless (do i??). or some work isnt... but one day?! c'maaaaan.

yeah i took the day off work today.