Altizer offered a radical theology of the "death of God" that drew upon William Blake, Hegelian thought and Nietzschean ideas. He conceived of theology as a form of poetry in which the immanence (presence) of God could be encountered in faith communities. However, he no longer accepted the possibility of affirming belief in a transcendent God. Altizer concluded that God had incarnated in Christ and imparted his immanent spirit which remained in the world even though Jesus was dead. Unlike Nietzsche, Altizer believed that God truly died. He was considered to be the leading exponent of the Death of God movement.