"The idea of opportunity costs presumes the fungibility of human experience: all our activities are equivalent or interchangeable once they are reduced to the abstract currency of clock time, and its wage correlate. But, against the ever-expanding imperium of economics, we do well to insist on what we know firsthand, namely, the concrete heterogeneity of human experience - its apples-versus-oranges character. From an economistic mind-set, spiritedness or pridefulness appears as a failure to be properly calculative, which requires that one first be properly abstract. Economics recognizes only certain virtues, and not the most impressive ones at that. Spiritedness is an assertion of one's own dignity, and to fix one's own car is not merely to use up time, it is to have a different experience of time, of one's car, and of oneself." - Matthew B. Crawford, Shop Class as Soulcraft
