Can you teach writing?

The age-old question.  I have always said this:  You can teach yourself (or others) to see beyond what is near, to spend time with what you're not, to bear in mind the symphonic construction of a passage, or an idea.  You can teach process:  Don't hurry.  You can teach living:  Go out, adventure, return.  You can fracture safety zones.  But the job of a teacher, most of all (I think), is to know what others have written and what another must read, right now, this second, in the midst of the long journey.