What's the Big Idea?

I was taught that every sermon should have a main idea that encapsulates the message of the Scripture text you are preaching. It is what Haddon Robinson calls the "Big Idea." Some call it the central idea, the proposition, etc. Having been a pastor for 15 years I am more convinced than ever that every sermon should have a Big Idea. Most all preachers will agree.

But, there are a variety of opinions as to how the Big Idea should be worded.  Some say it should be 15-18 words. Others say it should be as short as possible. As I said, there are a variety of opinions. Well, I have decided to ask you, those who listen to preaching, what you think about one particular issue regarding the Big Idea of a sermon. Some advocate simply stating the Big Idea as in a straightforward manner without trying to make it memorable or catchy. Others think you should try to word it in such a way that it is easily remembered. Let me give a few example.

A: Humble yourself and you will be exalted.
B: The way up is down.

A: God's discipline does not change our hope in Christ.
B: God's discipline does not divert the Christian's destiny.

A: The Christian's response to government persecution is prayer.
B: When governments attack, by prayer we fight back.

I'd like to know what you think. Do you prefer A (a straightforward clear statement), or B (something a little more rememberable)?  Please leave a comment sharing which you prefer and why. Thanks for your help.