Ancient and modern languages teem with happily expressed sentiments of more or less force and beauty, sufficiently individualized and excellent to warrant their reproduction and classification. – Maturin M. Ballou, January 1886, preface to Edge-Tools of Speech

Reframing an extract as a quotation constitutes a kind of coauthorship. With no change in wording, the cited passage becomes different. I imagine that the thrill of making an anthology includes the opportunity to become such a coauthor. – Gary Saul Morson, The Words of Others: From Quotations to Culture, 2011

Whenever we would prepare the mind by a forcible appeal, an opening quotation is a symphony preluding on the chords whose tones we are about to harmonize. – Isaac D’Israeli, “Quotation,” A Second Series of Curiosities of Literature

A vast meaning is unfolded in each line, with such power that a sentence only a line long would suffice for a whole life’s training. – Rufinus (translated from Latin), about The Sentences of Sextus