"One of these days you are going to look up and see the sky black with American bombers. A solid overcast of them. That's a promise, from me to you. And don't ever forget that I told you."
(Frank Savage to Jesse Bishop, "Twelve O'Clock High." The book, not the film)
And depending on how I'm feeling:
"Tho' much is taken, much abides; and though
We are not now that strength which in old days
Moved earth and heaven; that which we are, we are;
One equal temper of heroic hearts,
Made weak by time and fate, but strong in will
To strive, to seek, to find, and not to yield."
Alfred Lord Tennyson, "Ulysses"