Should we not
think to think
if someone
does not think?

Hardly a thing
to think, of course
to think of something,
something, that
causes someone, something
to think

Such madness
that befalls one
to think of such things

But in the end
we should think
without heed
without heed to what we think
at all

David Fallis

http://www.poemhunter.com/poem/thinking-18/