The structure of this world is that God created enemi/es and our job is to transform or eliminate.

When Moshiach comes, our service of God, in fact entire reality, which consists of time/space/ soul will be complete.

As in the Mitzvah of Bikkurim, designating your first produce for God, so God created the world to have independent entities, including ourselves, that CHOOSE to give our lives & possessions to God.

Because the Jewish people are connected to God and this world, therefore they can can connect the world to God.