Bible Verses About Warfare of Saints: The world

These things I have spoken to you, that in me you may have peace. In the world you shall have distress. But have confidence. I have overcome the world.

For whatsoever is born of God overcometh the world. And this is the victory which overcameth the world: Our faith.

Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?