Crazy for you

There are some days when everyone I see is a lunatic.
—Renata Adler, Speedboat

It was amazing how often kind-looking people turned out to be crazy.
—Don DeLillo, Ratner's Star

I did a bit more wilting. It seemed to me that I was alone in a deserted smoking-room with a homicidal loony. It is a type of loony I particularly bar, and the homicidal loony I like least is one with a forty-four chest and biceps in proportion. —P.G. Wodehouse, Jeeves and the Feudal Spirit