 As the concept of technê develops, the role of reflective knowledge is emphasized. Whereas technê is associated with knowing how to do (epistasthai) certain activities, epistêmê sometimes indicates a theoretical component of technê. For example, the physician knows how to care for the sick (Rep. 342d), to prescribe a regimen (Rep. 407d), to provide for the advantage of the body (Rep. 341e), to make someone healthy (Charm. 174c), to make someone vomit (Laws 933b). However, the epistêmê associated with craft means more than simply how to do certain activities. The physician knows or recognizes (gignôskein) health by medical knowledge (epistêmê) (Charm. 170c). Since health is the goal of the medical craft, the physician understands the goal of the craft. Plato emphasizes this knowledge as a distinct aspect of the craftsman’s skill. Sometimes this aspect is theoretical in the root sense of theôria — looking. In the Cratylus (389a–b) Socrates talks about the carpenter who makes the weaver’s shuttle; he looks to (blepôn) something whose nature is to weave. This latter seems to be a material model because Socrates supposes what would happen if it were to break. In that case, the carpenter looks to the form (eidos) of shuttle, that which is shuttle (ho estin kerkis). In the Gorgias (503d-e) all craftsmen work not at random but look toward the goal of their craft (ergon) so that what each produces will have a certain form. Socrates cites painters, housebuilders, and shipbuilders. In Republic VI Socrates compares philosophers who are rulers to painters who look to a model (484c).