There's such a jolly thin wall between the sanest, most level-headed beef-eating Squire in the country and the maddest poet in Bedlam.
"Fortitude"
Hugh Walpole
You may take the sanest person in the world, and tell them they are insane, and treat them as your Superintendent treats them there-it is the most trying ordeal a person can pass through and not really become insane.
"Marital Power Exemplified in Mrs. Packard's Trial, and Self-Defence from the Charge of Insanity"
Elizabeth Parsons Ware Packard
Speaking to his constituents early in the New Year of 1914 he said, "The Prime Minister is as firm as a rock, and is, I believe, the strongest and sanest man who has appeared in British politics in our time."
"John Redmond's Last Years"
Stephen Gwynn