I think therefore...

Whilst feeling existentially sensitive,
With a sigh R. Descartes waxed plain-tive:
“If I’d had but a thought,
I’d avoid being naught-
So I’ll think, then I’d be, and so hence I’d live!”

Dude!

He, in a thick cloud of incense, said "If
Mom's nose were a bit less sensitive
less time would be spent
on masking the scent
and more would be free for to tend the spliff".