Ralph Keyes calls quotation collectors “quotographers,” the men and women who gather catchwords, watchwords, war words, winged words, maxims, mottos, sayings, and quips into books of a thousand pages. Through the centuries quotation collectors have saved quotations that would otherwise be lost. – Willis Goth Regier, Quotology, 2010

Nevertheless, a maxim does not necessarily become a proverb. Many grubs never grow to butterflies; and a maxim is only a proverb in its caterpillar stage—a candidate for a wider sphere and longer flight than most are destined to attain. – “Proverbs Secular and Sacred,” The North British Review, February 1858

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