The Big Questions

I posted a list of my questions about the Sermon on the Mount over at johnnymail but here are my most pressing questions:

What is the "good news [gospel] of the kingdom"?

Where is the good news in the Sermon on the Mount?


also:

How can I develop the Legalism vs. Heart-condition... How can I even put it in the form of a question?

How does the slave -> son/heir transition work? (Gal. 4:7)