Wondergirl, I see your encapsulation of salvation by the use of Ephesians 2:8,9 as an extreme OVERSIMPLIFICATION. After all it took God the entire Bible to present the Gospel to the world.
And yes I can give a summation that includes one very important aspect you seem to have excluded from your "encapsulation." That is the aspect of judgment and the coming Judgment Day on the unsaved of the world. Matthew 5:13 speaks about salt having lost its savour. Salt being a symbol God uses for judgment.
A much more balanced picture of the WHOLE GOSPEL is given by 2 Corinthians 2:15 and 16. And you could throw in verse 17 for good measure. Happy reading !