The metaphorical view of language doesn't treat concepts as small, composable chunks of truth, but instead, experiences.
Whether in national politics or everyday interaction, people in power get to impose their metaphors.
Metaphors may create realities for us, especially social realities. A metaphor may thus be a guide for future action. Such actions will, of course, fit the metaphor. This will, in turn, reinforce the power of the metaphor to make experience coherent. In this sense metaphors can be self-fulfilling prophecies.