My thesis in this text is that A. Ernst Cassirer outlines a philosophical t
heory that proves equally sensitive to historical change and to the consist
ency of conceptual thinking. B. Cassirer relies on the differential logic o
f an internally ruptured, and yet undivided "basis phenomenon." Especially
his reading of Goethe has led to the concept of the basis phenomenon existi
ng in a differential symbolic mode. Cassirer's delineation of Goethe's conc
eptual trivium of Urphanomene - "experience,""deed," and "life" - underscor
es the conceptual rupture in the construction of any basis phenomenon. Furt
hermore, I argue that C. the Philosophy of Symbolic Forms, takes up Goethe'
s notion of basis phenomena and eventually turns it into a modern, pluralis
tic theorem about the interrelation of science and culture. Cassirer reache
s this aim by (1) focusing on the question of philosophical inquiry as a ba
sis phenomenon in the sense of a basic philosophical activity. I also argue
that (2) Cassirer's view retains an essentially ambiguous character, as op
posed to a fundamentalist notion of basis phenomena. It is important to see
that (3) this ambiguity also informs Cassirer's notion of culture (the plu
rality of symbolic forms), as well as his delienation of the relation betwe
en culture and science.