When we look at the full context of how God uses the world, somewhere, somehow the idea has snuck into modern thinking that this is the devil's world.
God created all things, if the argument that it is a fallen world and belongs to the devil, I would contend that all things work together for the good.
The world as we know it now is used as a schoolhouse for the Father to bring individuals! first to Christ, and then the training of sons/daughters in this world.
Christians need A Renewed mind with the understanding of how God operates in this world.
To give a witness for Christ they have to have an understanding of Christ as their life, if we just look at things from the standpoint of Good and Evil, which is just one knowledge, we have a hard time explaining to the world why the world is the way it is.
All the pat answers begin.
The knowledge of Christ is a different knowledge than the knowledge of Good and Evil. The believer will judge everything based on Good and Evil, they will see things as either being good or being evil.
So the individual becomes as Paul said tossed to and fro by many doctrines.