The idea is that God [abstract] engages the world in all it’s profanity through the Incarnation of Christ. We are the profane [negative] and stand in complete contradiction to the Spirit/Divine. At the cross we find the death of Christ which is also the death of God. Now through the death of God we find the end of transcendence. The God who was once [out there] is now [right here]. This is ultimately the [concrete] in the dialectic. So what we find is not a bodily resurrection back into transcendence, but instead the complete self emptying of this transcendence into immanence. There is nothing pulling the strings in our life, so now we as humans must face the responsibility of our actions/in actions. The immanence creates a forward movement into our modern world. Now theology is no longer a static discussion based on rituals and dogmas, but instead we find a religionless Christianity that engages our modern world.
This is crucial, because now Christianity isn’t about life after death, but about life before you die. For Zizek the message of Christ was apocalyptic at its core. For us to find meaning and live as fully human we must rupture the structures that shape and skew our ideologies. With that comes true freedom from not only the state, but from religion itself.
Image source and article: http://www.patheos.com/blogs/tonyjones/2013/09/13/slavoj-zizek-and-the-illusion-of-religion/