Some men will undertake to do it for pay

Just because it's a Saturday...
A couple of pieces of well-crafted prose on the subject of the separation of sanity from insanity.

The first is a rather remarkable editorial from the Times of Saturday July 22nd, 1854.

“Nothing can be more slightly defined than the line of demarcation between sanity and insanity. Physicians and lawyers have vexed themselves with attempts at definitions in a case where definition is impossible. There has never yet been given to the world anything in the shape of a formula upon this subject which may not be torn to shreds in five minutes by any ordinary logician. Make the definition too narrow, it becomes meaningless; make it too wide, the whole human race are involved in the drag-net. In strictness, we are all mad as often as we give way to passion, to prejudice, to vice to vanity; but if all the passionate, prejudiced, vicious, and vain people in this world are to be locked up as lunatics, who is to keep the keys to the asylum?” 

The second is from "Billy Budd" by Herman Melville.

"Who in the rainbow can draw the line where the violet tint ends and the orange tint begins? Distinctly we see the difference of the colors, but where exactly does the one first blendingly enter into the other? So with sanity and insanity. In pronounced cases there is no question about them. But in some supposed cases, in various degrees supposedly less pronounced, to draw the exact line of demarkation few will undertake tho' for a fee some professional experts will. There is nothing namable but that some men will undertake to do it for pay."

If, of course, you have your own examples.... please send them through.