Every nation has customs, ways of behaving and ways of looking at the world that typify the culture. Behind all the customs may be found a worldview, an overarching understanding of how the world works, how it was made, and how one should conduct oneself in it. Worldview is the wallpaper of life, the background for all one sees and does. God gives very specific instructions to Jeremiah about worldview and customs. Paul presents the basic Christian worldview to assembled Greek philosophers, while Jesus insists God does have an unchanging worldview.