Churchill ends his speech on an upbeat note:

But I take up my task with buoyancy and hope. I feel sure that our cause will not be suffered to fail among men. At this time I feel entitled to claim the aid of all, and I say, "come then, let us go forward together with our united strength." (29-31)

He's spent the last few minutes emphasizing (a) the danger of the war to come, and (b) that Britain really, really has to win, or else they'll lose everything and civilization as we know it will be toast. That's mildly terrifying, especially for folks who remember the horror of World War I. Churchill goes on about the need for "victory at all costs" (27) because for the past few years everyone had been trying to appease Hitler. Now it was time to fight.

Yet at both the beginning and the end of the speech, Churchill emphasizes the unity of the country. People always feel safer charging into danger when they aren't doing it alone. Churchill's also demonstrating that he's not going to pull a Hitler and just take power for himself in order to fight.

Plus Churchill throws in some "don't worry, we've got this" lingo to give his listeners some much-needed confidence. Britain wasn't really militarily prepared for the upcoming battle (which the MPs would have well known), but Churchill makes sure to end his first speech to them on this optimistic note. It's the last thing they hear, which is always the easiest thing to remember.

Keep that in mind when you write your next speech to an important legislative political body.