A cheerful face is nearly as good for an invalid as healthy weather.
— Benjamin Franklin

The modern sympathy with invalids is morbid. Illness of any kind is hardly a thing to be encouraged in others.
Oscar Wilde invalidating quote

Every invalid is a physician.
— Proverbs

Those who invalidate reason ought seriously to consider whether they argue against reason with or without reason.
— Ethan Allen

Never speak to an invalid from behind, nor from the door, nor from any distance from him, nor when he is doing anything. The official politeness of servants in these things is so grateful to invalids, that many prefer, without knowing why, having none but servants about them.
— invalidating quotation by Florence Nightingale