This paper deals with the main results of a systematic investigation (Martín 2005), supported by concordance analysis, of the metaphorical expressions found in Reiß-Vermeer (1984) and Holz-Mänttäri (1984), two works that in the 1980s established the theoretical foundations of German functionalism. Based on the cognitive theory of metaphor (Lakoff and Johnson 1980, 1999; Lakoff 1987; Johnson 1987; Lakoff 1993), the analysis led to the identification of two conceptual metaphors that played a crucial role in the articulation of German functionalism: the TRANSFER metaphor and the TARGET metaphor. The paper focuses on the main implications of the use of these metaphors and on the contradictions they create. A broadening of the functionalist theoretical framework is then proposed with the goal of overcoming these contradictions.