The real message of Christianity isn't about a saviour. Of course, Jesus Christ is the Saviour of the world, but He didn't just come to save us. If that were all He came to do, it wouldn't have been adequate for righteousness. In Christianity, there's much more than being saved.
Deuteronomy 6:23 gives us the key to God's purpose: "And he brought us out from thence, that he might bring us in, to give us the land which he sware unto our fathers." Notice the verse doesn't say, "He brought us out and brought us in." He brought us out (saved us) for a reason: "that He might bring us in." This expression is about one word: Purpose. But that's not all. He "brought us in" to give us the land of our inheritance and make us great, as He said to Abraham.
God had said to Abraham, "I will make you great and I will make your seed after you great." But his descendants became slaves in Egypt, and that wasn't greatness. When it was time for His purpose for their lives to be realized, so that they'd become the great ones that He wanted them to be, He set them free, brought them into a place of liberty, and gave them the land.
When Jesus came, He brought us out of sin that we might inherit His righteousness. He brought us out of pain and penury that we might have life in abundance, a life of prosperity and abundant wealth. He didn't just come to save us; He came to give us "the land," that we might live in prosperity, health and soundness every day in this earth, and live to the praise of His glory. That way, we can help others learn about Him, so they can have a great life too.