Most people don't realize how metaphors permeate our everyday language and thought. ("Permeate" is a metaphor.) James Geary's book emphatically and with ample evidence makes the point about the ubiquity of metaphor/simile/analogy. "Metaphor lives a secret life all around us. We utter about one metaphor for every ten to twenty-five words, or about six metaphors a minute." For example, looking at an Aug. 5, 2001, San Jose Mercury News A1 story and headlines on the Dow Jones average losing 512.76 points, I see that the large headline reads, "DOW PLUMMETS." The sub-head says, "Stock markets crater after dismal economic reports spark worries that double-dip recession looms." I count five metaphors. The story mentions "worst rout in more than two years," "steep decline," and "stocks have now fallen."
Up/down spatial metaphors, such as those in those headlines and story, can be found in speech and writing all the time. Up is good and down is bad: "down in the dumps," "upscale," "high-end," "low-down," "upper class," "low-quality," "high society," "declining health," "high spirits," "depressed," "low energy," etc.
"I Is an Other" covers some of the same ground as the George Lakoff and Mark Johnson 2003 book "Metaphors We live By," which I read a few years ago. But Geary explores territory that was new to me, particularly a few paragraphs on music. I hadn't thought much about it, despite a lifelong interest in classical music and playing the piano for several decades, that the structure of music is metaphoric. We talk about "high C" and "middle D," "high notes" and "low strings." Musical notation is entirely metaphoric, with tones with a "higher" frequency getting written higher on the staff than tones with "lower" frequency. But in no real sense are tones or notes "higher" or "lower." We can talk only about frequencies, vibrations, and wave lengths of tones, which are themselves metaphors.
At its fundamental level, music is abstract, and when we talk or write about abstract subjects, it is impossible not to fall back on metaphors. A good example is time. Time in its essence has no concrete properties: it has no color, dimension, texture, smell, sound, or taste. Time cannot be described in anything but metaphors. Thus we talk about time as motion ("times flies," "Wednesday's meeting has been moved"), time as a quantity ("saving time"), and time as a line (future as forward, past as back in Western cultures, days and years as dots on a long line, etc.).
But I think most of us forget that these metaphorical descriptions of time are not literal representations of time. They are "time is like ..." not "time is ..." Thus time is not a line or road or a distance. An event 40 years ago is not further away in any real sense than an event of three days ago. And certainly a memory from 40 years ago can be much more vivid ("closer" in a metaphorical sense) than a memory of three days ago.
We cannot talk or write about time except metaphorically. We cannot in a literal sense talk or write about the essence of time, time as it is. And I'm not sure time would have any existence or meaning without a being to experience (or manufacture?) it. Thus time -- which dominates our lives -- is a property-less entity that we can only talk around. It is a true mystery.
Geary's book on metaphors contains many nuggets (a metaphor) of information, research, and examination of subjects such as time, music, politics, science, proverbs, and money, subjects that we deal with most days but don't realize how saturated (another metaphor) with metaphors they are.