Metaphor representation theory posits that people often think, rather than merely speak, metaphorically. Particularly, concrete domains (e.g., tactile experiences) are recruited to represent abstract concepts (e.g., love). Based upon this theory, three assumptions can be derived. The first assumption is that metaphors should be common in speech and are not relegated to the realm of poetics. Second, the manipulation of metaphoric mappings should activate associated domains. The final assumption is that the use of conceptual metaphors facilitates the understanding of concepts with no physical referents (e.g., emotion). Research has supported the first two assumptions. The current studies were the first empirical test of the third assumption. A metaphor usage measure was developed and validated in the first study. Two additional studies directly tested the third assumption. Study 2 demonstrated that the metaphor usage measure predicted emotional understanding. Study 3 demonstrated that low metaphor usage predicted dysfunctional responses to negative daily events to a greater extent than high metaphor usage. Those scoring higher in metaphor usage also showed the established sweetness-pro-sociality metaphor effect to a greater extent than those low in metaphor usage. These findings empirically support the idea that metaphor use is associated with an increased understanding of concepts lacking physical referents, an important theoretical question in the metaphor literature. A foundation for future research is provided.