I've looked at a few grammars, but I'm still confused about how voice--especially the middle voice--relates to transitiveness. In Dana and Mantey's book, I read that transitiveness belongs to the verbal idea, and that voice sometimes affects the verbal idea (Section.151). From Smyth (Section.1717) I gathered that the Direct Reflexive Middle would indicate transitiveness, because the self is the direct object. But Smyth also says (Section.1706) that the object of a transitive verb is always put in the accusative.
Could anybody comment on this, perhaps noting the passive voice as well? Or maybe suggest something else I could read?