California Teacher Guy has been on a poetry kick lately. I like his stuff very much and suggest you take a look. One of his poems reminded me of another I like. It's simple, and I wonder if my students would understand it as a cautionary tale.
Incidentally, if you're the guy in the picture on the left, I don't recommend you begin with this one:
Oh Yes
there are worse things than
being alone
but it often takes decades
to realize this
and most often
when you do
it's too late
and there's nothing worse
than
too late.
-Charles Bukowski