Pannenberg's
epistemology, explained clearly in his shorter essays, is crucial to his theological project. It is heavily influenced by Schlink, who proposed a distinction between analogical truth, i.e. a descriptive truth or model, and
doxological truth, or truth as immanent in worship. In this way of thinking, theology tries to express doxological truth. As such, it is a response to God's self-revelation. Schlink was also instrumental in shaping Pannenberg's approach to theology as an
ecumenical enterprise – an emphasis which remained constant throughout his career. Pannenberg's understanding of
revelation is strongly conditioned by his reading of
Karl Barth and
Georg Wilhelm Friedrich Hegel, as well as by a sympathetic reading of Christian and Jewish
apocalyptic literature. The Hegelian concept of history as an unfolding process in which Spirit and freedom are revealed combines with a Barthian notion of revelation occurring "vertically from above". While Pannenberg adopts a Hegelian understanding of History itself as God's self-revelation, he strongly asserts the
resurrection of Christ as a
proleptic revelation of what history is unfolding. Despite its obvious Barthian reference, this approach met with a mainly hostile response from both
neo-orthodox and liberal
Bultmannian theologians in the 1960s, a response which Pannenberg claims surprised him and his associates. A more nuanced, mainly implied, critique came from
Jürgen Moltmann, whose philosophical roots lay in the
Left Hegelians,
Karl Marx and
Ernst Bloch, and who proposed and elaborated a Theology of Hope, rather than of prolepsis, as a distinctively Christian response to History. As a disciple of
Karl Löwith, Pannenberg continued the debate against
Hans Blumenberg in the so-called 'theorem of secularization'. "Blumenberg targets Löwith's argument that progress is the secularization of Hebrew and Christian beliefs and argues to the contrary that the modern age, including its belief in progress, grew out of a new secular self-affirmation of culture against the Christian tradition." Pannenberg is perhaps best known for
Jesus: God and Man in which he constructs a
Christology "from below", deriving his dogmatic claims from a critical examination of the life and particularly the
resurrection of Jesus of Nazareth. This is his programmatic statement of the notion of "History as Revelation". He rejects traditional
Chalcedonian "two-natures" Christology, preferring to view the person of Christ dynamically in light of the resurrection. This focus on the resurrection as the key to Christ's identity has led Pannenberg to defend its historicity, stressing the experience of the risen Christ in the history of the early Church rather than the empty tomb. Eschatological views of Pannenberg discount the importance of temporal process in the New Creation, time being linked with the sinful present age. He preferred an eternal present to limited concepts of past, present and future and an end of time in a focused unity in the New Creation. Pannenberg has also defended the theology of American
mathematical physicist Frank J. Tipler's Omega Point Theory. Central to Pannenberg's theological career was his defence of theology as a rigorous academic discipline, one capable of critical interaction with philosophy, history, and most of all, the
natural sciences. Michael Root wrote on
First Things in 2012, "In recent years, he has been outspoken in his opposition within the
Evangelical Church in Germany to any approval of homosexual relations. He said that a church that approved homosexual relations had by that act ceased to be a true church. In 1997, he created a public stir when he returned his
Federal Order of Merit after the order was bestowed on a lesbian activist." == Public Lectures ==