Are you green and growing or ripe and rotting?
— Ray Kroc

It rots a writer's brain, it cretinises you. You say the same thing again and again, and when you do that happily you're well on the way to being a cretin. Or a politician.
John Updike rotting quote

There is a slowness in affairs which ripens them, and a slowness which rots them.
— Joseph Roux

I would just like to mention Robert Houdin who in the eighteenth century invented the vanishing birdcage trick and the theater matinee - may he rot and perish. Good afternoon.
— Orson Welles

From my rotting body, flowers shall grow and I am in them and that is eternity.
— rotting quotation by Edvard Munch