Quotations are useful in periods of ignorance or obscurantist beliefs. – Guy Debord

Ideas improve. The meaning of words participates in the improvement. Plagiarism is necessary. Progress implies it. It embraces an authors phrase, makes use of his expressions, erases a false idea, and replaces it with the right idea. – Guy Debord
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. – Guy Debord
The present volume is the result of a taste for collecting poetical quotations, which beset me in the days of my nonage, now more than half a century ago…. I read the poets diligently, and registered, in a portable form, whatever I thought apposite and striking. – Henry G. Bohn, A Dictionary of Quotations from the English Poets, 1881