I once heard him discuss
 the subject of estate management in the following
 manner.
 Tell me, Critobulus, is
 estate management the name of a branch of knowledge,
 like medicine, smithing and carpentry? I think so, replied
 Critobulus. And can we say what the
 function of estate management is, just as we can say
 what is the function of each of these arts? Well, I suppose that the
 business of a good estate manager is to manage his
 own estate well.