Are we strangers?

There are times when the Bible saying "aliens and strangers in this world" comes to my mind.

Sometimes it is a political statement. If we (cristians) are aliens and strangers, simple pilgrims in this world, why should we impose our laws into the codes of a country? If you believe and divorce, you will go to hell, but not to jail.

Sometimes, it is about life. A twist of logic makes someone's mistake become your fault.

Sometimes it is about Belgium.
In my home town, we say "little blond heads" and we mean a bunch of children from some remote north- or east- European country.
In my country of adoption, they say "little blond heads" and they mean their own children playing in the backyard.