But further, in order to embellish it with flowers of language and gems of thought, it is not necessary for this ornamentation to be spread evenly over the entire speech, but it must be so distributed that there may be brilliant jewels placed at various points as a sort of decoration. – Cicero, De oratore

Whoever reads only to transcribe or quote shining remarks without entering into the genius and spirit of the author, will be apt to be misled out of a regular way of thinking, and the product of all this will be found to be a manifest incoherent piece of patchwork. – Attributed to Swift in A Dictionary of Thoughts, Being a Cyclopedia of Laconic Q

The man whose book is filled with quotations, may be said to creep along the shore of authors, as if he were afraid to trust himself to the free compass of reasoning. – Quoted unattributed in The Universal Magazine of Knowledge and Pleasure, April 1