Who said “Quotations are useful in periods of ignorance or obscurantist beliefs.”?

“One must be a wise reader to quote wisely and well.”

“The act of repeating erroneously the words of another.”

“The surest way to make a monkey of a man is to quote him.”

“Classical quotation is the parole of literary men all over the world.”

“The wisdom of the wise, and the experience of ages, may be preserved by quotation.”

“Boredom is always counter-revolutionary. Always.”

“Tourism, human circulation considered as consumption is fundamentally nothing more than the leisure of going to see what has become banal.”

“Art need no longer be an account of past sensations. It can become the direct organization of more highly evolved sensations. It is a question of producing ourselves, not things that enslave us.”

“In societies where modern conditions of production prevail, all of life presents itself as an immense accumulation of spectacles. Everything that was directly lived has moved away into a representation.”

“There is nothing more natural than to consider everything as starting from oneself, chosen as the center of the world; one finds oneself thus capable of condemning the world without even wanting to hear its deceitful chatter.”

“Ideas improve. The meaning of words participates in the improvement. Plagiarism is necessary. Progress implies it. It embraces an author's phrase, makes use of his expressions, erases a false idea, and replaces it with the right idea.”