[Es ist schlimm, wenn zwei Eheleute einander langweilen, viel schlimmer jedoch ist es, wenn nur Einer von ihnen den Andern langweilt.]
It's bad enough when married people bore one another; but it's far worse when only one of them bores the other.
[tr. Scrase/Mieder (1994)]
FIRMNESS: A form of stupidity: proof of an inability to think the same thing out twice.
[A Book of Burlesques, "The Jazz Webster" (1924)]