Some short poems that “work” for me:

Two from Cid’s book Livingdying (New Directions, 1970):

Of course,
life matters.
Twitter,

sparrow,
and let me
know it

Why do I like these six ambiguous–even confused–lines? I think it’s because of the sudden intervention of that word Twitter which leads the poem from head to heart, from windy abstraction to a Keatsian engagement with the concrete. I also appreciate the lack of a period at the end–the song continues beyond the poem, can you hear it? The sparrow of course informs the intellectual of its position.

Where I kneel
a rock stands

So much is said in the unsaid of these two lines.

Harvey Shapiro is a poet I am appreciating more and more as I read through his fine collection The Sights Along the Harbor (Wesleyan, 2006). Shapiro has many wonderful short poems, and whereas Cid remains rather cold and metaphysical, Harvey is not afraid to use Henny Youngman humor in his work. The following is just one example among many:

Glory

In the museum of antiquities
I ran my hands over
The breasts and thighs
Of the young Aprhrodite
And heard her say, kiss my ass.