《列子·说符》
像九方皋所观察的，是马的天机禀赋，他观察到马的精髓，也就忘记了表象；注重的是马的内在品性，也就忽略了外在皮毛；看到应当看的，不看不必看的；观察应当观察的，忽略不应当观察的。
若皋之所观，天机也，得其精而忘其粗，在其内而忘其外；见其所见，不见其所不见；视其所视，而遗其所不视。
Like the way Jiufanggao observed, he observed the horse's innate disposition and forgot its appearance; he focused on its inner qualities and ignored its coat; he saw what he should see and ignored the unimportant things; he observed what he should observe and ignored the insignificant things.