Why does philosophy use concepts and why does faith use symbols if both try to express the same ultimate? The answer, of course, is that the relation to the ultimate is not the same in each case. The philosophical relation is in principle a detached description of the basic structure in which the ultimate manifests itself. The relation of faith is in principle an involved expression of concern about the meaning of the ultimate for the faithful.
Paul TillichThe citizens of a city are not guilty of the crimes committed in their city; but they are guilty as participants in the destiny of [humanity] as a whole and in the destiny of their city in particular; for their acts in which freedom was united with destiny have contributed to the destiny in which they participate. They are guilty, not of committing the crimes of which their group is accused, but of contributing to the destiny in which these crimes happened.
Paul TillichSpirit is the presence of what concerns us ultimately, the ground of our being and meaning.
Paul TillichThere is faith in every serious doubt, namely, the faith in the truth as such, even if the only truth we can express is our lack of truth.
Paul Tillich