It's the slogan, stupid
If you ever want to know what a leader's speech is going to be about, read the conference slogan. The Tories' slogan - "Together in the National Interest" - will be David Cameron's theme. He will try to inspire the country to join the coalition government in facing up to the crisis the country faces.
JFK famously declared "ask not what your country can do for you, ask what you can do for your country". Stand by for a Cameron equivalent.