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A metaphor is not merely a linguistic expression (a form of words) used for artistic or rhetorical purposes; instead, it is a process of human understanding by which we achieve meaningful experience that we can make sense of. A metaphor, in this "experiential" sense, is a process by which we understand and structure one domain of experience in terms of another domain of a different kind.Mark Johnson
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A crucial point here is that understanding is not only a matter of reflection, using finitary propositions, on some preexistent, already determinate experience. Rather, understanding is the way we "have a world, " the way we experience our world as a comprehensible reality. Such understanding, therefore, involves our whole being - our bodily capacities and skills, our values, our moods and attitudes, our entire cultural tradition, the way in which we are bound up with a linguistic community, our aesthetic sensibilities, and so forth. I short, our understanding is our mode of "being in the world." It is the way we are meaningfully situated in our world through our bodily interactions, our cultural institutions , our linguistic tradition, and our historical context. Our more abstract reflective acts of understanding (which may involve grasping of finitary propositions) are simply an extension of our understanding in this more basic sense of "having a world.Mark Johnson