Cognitive linguists emphasize that metaphors serve to facilitate the understanding of one conceptual domain, typically an abstract one like "life" or "theories" or "ideas", through expressions that relate to another, more familiar conceptual domain, typically a more concrete one like "journey" or "buildings" or "food".[25][26] Food for thought: we devour a book of raw facts, try to digest them, stew over them, let them simmer on the back-burner, regurgitate them in discussions, cook up explanations, hoping they do not seem half-baked. Theories as buildings: we establish a foundation for them, a framework, support them with strong arguments, buttressing them with facts, hoping they will stand. Life as journey: some of us travel hopefully, others seem to have no direction, many lose their way.