The mind, once stretched by a new idea, never regains its original dimensions.
— Oliver Wendell Holmes Jr.

A mind that has been stretched will never return to it's original dimension.
Albert Einstein stretched quote

I feel thin, sort of stretched, like butter scraped over too much bread.
— J. R. R. Tolkien

Man's mind, stretched by a new idea, never goes back to its original dimensions.
— Oliver Wendell Holmes

A mind that is stretched by a new experience can never go back to its old dimensions.
— Oliver Wendell Holmes, Jr.