In the first half of the nineteenth century the dispute over the compatibility of the Christian faith with the new scientific discoveries was one of the hottest debates in the Western theologians' thoughts, especially in Germany. Most of the Protestant theologians, who were known as "liberal", believed that in the light of the new scientific discoveries, the Christian faith and theology alike needed reconstruction. These theologians came to this conclusion that religion and culture were, in practice, one and the same. Tillich's work, in between, was a continuation of such a view about religion and culture. One can say that, indeed, all his endeavors are to show a kind of coherent and logical compatibility between Christianity and the new culture. He does this in his most important book Systematic Theology. In this article, along presenting and analyzing his work in this book, his success in this regard is evaluated. He believes the relation between theology and situation, which is the relation between religion and culture, is in fact the relation between "asking" and "answering". Religion and culture always constitute a unified whole, the form of which is culture and the content and essence of which is religion...