The biggest change I noticed while reading this book, was the faith of the Sawi's. As Don Richardson transformed their faith into Christianity, the Sawi also changed parts of their culture like cannibalism, and became more open to Don. At first, they were aware of Don's presence, and did not accept him. They were skeptical about him, like we are skeptical about God's existence. The Sawi, however, in my opinion, were able to accept Don easier since Don was a "real" person preaching and serving them. It was Don who they accepted first, and then God, but our modern society is already aware of God, so we don't have much ways to step up to God. Churches or preachers like Don may guide our way, but the people in our society are much more skeptical about the existence of God and all of his words. It was probably easier for the Sawi to accept God, since they never encountered such religion and belief. In some ways, it might've been harder for the Sawi, but I think it is harder for us to accept God nowadays. Since there are so much obstacles and temptations blocking God from us, it is probably more difficult for us.
This doesn't mean that all people are skeptical about God. The connection that I was able to make with the transformation of the Sawi, was the transformation that happens in our school every year during S.E.W. Being in this school for over 10 years, I experienced numerous spiritual weeks, and every spiritual week, I sensed that God's powers were unlimited. Even though the transformation scale might be smaller in TCIS, it is inevitable that God does work through many individuals to change their lives. I see many people skeptical about God in TCIS every year, but I also see many of those people who change during spiritual weeks. So this shows that God really does have power, and it is up to us whether we accept that power, or reject it.