My favourite example of the power of a few words in a good poem is this one written during World War One:
'Good-morning, good-morning!” the General said
When we met him last week on our way to the line.
Now the soldiers he smiled at are most of 'em dead,
And we're cursing his staff for incompetent swine.
“He's a cheery old card,” grunted Harry to Jack
As they slogged up to Arras with rifle and pack.
But he did for them both by his plan of attack'.