Gertrude Stein’s writing could be impenetrable:

“Out of kindness comes redness and out of rudeness comes rapid same question, out of an eye comes research, out of selection comes painful cattle.”

Editor A.J. Fifield once sent her this rejection slip:

I am only one, only one, only one. Only one being, one at the same time. Not two, not three, only one. Only one life to live, only sixty minutes in one hour. Only one pair of eyes. Only one brain. Only one being. Being only one, having only one pair of eyes, having only one time, having only one life, I cannot read your MS three or four times. Not even one time. Only one look, only one look is enough. Hardly one copy would sell here. Hardly one. Hardly one.