Every book is a quotation; and every house is a quotation out of all forests and mines and stone quarries; and every man is a quotation from all his ancestors. – Ralph Waldo Emerson, “Plato; Or, The Philosopher”

I believe it was Gayelord Hauser, the nutritionist, who said that “you are what you eat,” but if you happen to be an intellectual, you are what you quote. – Joseph Epstein, “Quotatious,” A Line Out for a Walk: Familiar Essays, 1991

I suppose every old scholar has had the experience of reading something in a book which was significant to him, but which he could never find again. Sure he is that he read it there; but no one else ever read it, nor can he find it again, though he buy the book and ransack every page. – Ralph Waldo Emerson

The multiplicity of facts and writings is become so great that every thing must soon be reduced to extracts and dictionaries. – Voltaire