G-d created a physical world and then hid Himself. Our job is to find Him within the physical world all around. Evil is what is stopping us from finding Him. Mashiach's job is to bring G-d into this world, thus abolishing the evil inclination and helping mankind turn the physical world into the spiritual world. The evil inclination creates all sorts of illusions in this world to divert us from the path of pursuing G-d; we must learn to listen to the G-dly voice within us and not be led astray. If we evict G-d, we end our own existence. Going against His mitzvos is as good as condemning the world to eternal darkness.