THERE ARE WORDS... LIKE STOP AND BUT

I love the word but,
just three letters,
two consonants and a vowel.
When it intrudes on a thought,
interrupts an idea,
stops what was thought to be logic
dead in its tracks,
nothing is left unexamined.
The whole world vibrates,
sits up and takes notice
waiting for the other shoe to fall.
There is nothing subtle about it.
A rhetorical question sneaks around an idea
slipping up on the process of thought
as if to keep it from running away.
But doesn't pull any punches.
It says, "You may have thought this.
I'll tell you another way to look at it."
And, ready or not, you get the new angle
on whatever idea it was you were considering
before the little contrary consonant jumped in
to force another look at the issue.