Once a Runner, Always a Runner

I went into a running store just to browse, because I have, and always have had, a tremendous obsession with running sneakers. As I browsed through the store, I thought, "What do these ambulatories make of a person in a wheelchair browsing around a running (the apex of bi-pedalism) store?" My dad says to a sales clerk, (the clerk clearly noticed my obsession with running sneakers) "once a runner, always a runner."