Much Madness is Divinest Sense

As I read Emily Dickinson's poem Much Madness is divinest Sense, I began to understand that Dickinson was inferring that madness might not be a negative thing.  This "divinest Sense" (Dickinson, 830) seems to be a rare and hard to attain. The speaker seems to say that only some become mad, but those who are mad, actually have much sense. To me, the quote, "Much Sense-the starkest Madness- 'Tis the Majority In This, as All, prevail-Assent-and you are sane," (Dickinson, 830), means that the majority of the world's population make the generalization and characterization of what a sane person is. However, the speaker seems to believe that this standard is wrong; those people marked "insane" are actually the smartest and have the most wisdom. Also, as I read, I did not know what "demur" (Dickinson, 830) meant. When I looked it up, it means "to make an objection." Within the context of the poem, I believe that Dickinson is insinuating even more persistently that the speaker objects to the society's understanding of the insane and mad people of the world.