Great point. Imagine if Dubya had walked up to the podium on September 12, 2001 and simply said "Cry havoc and let slip the dogs of war"-then walked away. Much more powerful and to the point then any 5 page speech. Then again, "You are either with us, or with the terrorists" was beautiful in it's own way.
Hear me more plainly.
I have in equal balance justly weigh'd
What wrongs our arms may do, what wrongs we suffer,
And find our griefs heavier than our offences.
(2 Henry IV 4.1.70-3)