Throughout history, God has demonstrably tended to favor the unassuming and humble in the world. The Jewish people were delivered from the mighty Egyptians. They had several ups and downs throughout the way, but they considered themselves to be His chosen people. Then Jesus came along, and since He was rejected by the Jewish people, He preached to the gentiles - those who were considered less in society. This should be a constant reminder not to assume too much, and not to place ourselves above our fellow man.
I believe the proper understanding of this is that the Holy Spirit goes where it desires, and God works in the world through and for Christians and non-Christians alike. Likewise, salvation wasn't offered exclusively for any sect or denomination, as God has revealed it is an open invitation for all who choose to accept it. Further, I believe there is also an esoteric message tucked away in scripture concerning the redemption of the fallen and the 'lost sheep'.
"The wind blows wherever it pleases. You hear its sound, but you cannot tell where it comes from or where it is going. So it is with everyone born of the Spirit." - John 3:8