17:56 Nov 29, 2009 

Hi Carole, I'm surprised you seem to think that it isn't a phrase in English. Although it's usually attributed to the Greek painter Apelles (4th century BC), it has been used in English since at least 1539 and first appeared in an English dictionary in 1616 (J. Withals Dict. rev. ed.) in the form "Cobler keepe your last". I can remember my father and grandfather using it. The phrase means, "Stick with what you know" or "Do not presume to address matters beyond your competence."

14:19 Nov 23, 2009 

et ordtak på engelsk? På norsk betyr det at man bør holde seg til det man har greie på. Altså i overført betydning, det har ingenting med konkrete skomakere å gjøre. Bare sånn i tilfelle du ikke visste det.