They are not of the world.
Christians are to be separated from the world internally, but not externally. We must live in the world, but our heart must enter the Kingdom. Many people have been set free from sin, but often experience limited freedom because of skin. Taking any interest in worldly endeavors distracts us from true freedom. We must take deliberate action to maintain interest in Spiritual endeavors. We must look outward with the inward Spirit as our guide. If God is truly our guide, our freedom is truly genuine.
Pray to be not of the world, but in the world.
Live Forever Free,