Heard about this poem at BSF last night. To me this poem speaks less about the indispensable man but more about the sovereignty of God. God will do what God will do and we are just along for the ride. 
THE INDISPENSABLE MAN
Author:
Saxon
White
Kessinger
When
you're
feeling so
important,
and your
ego is in
bloom
When
you simply
take for
granted
you're the
wisest in
the room.
When
you think
your very
absence
will leave
a great
big hole.
Just
follow
these
instructions.
They will
humble any
soul.
Take
a bucket
filled
with
water.
Put
your hand
in to the
wrist.
Pull
it out;
the hole
remaining
is how
much you
will be
missed.
Splash
wildly
when you
enter.
Stir
a lot and
splash
galore.
Then
stop, and
in a
minute it
will look
just like
before!
The
moral of
this story
is to do
the best
you can.
Be
proud, but
please
remember,
There is
NO
Indispensable
Man.