An epigram often flashes light into regions where reason shines but dimly. – Edwin P. Whipple, lecture delivered before the Boston Mercantile Library Associa

My quarrel with him is, that his works contain nothing worth quoting; and a book that furnishes no quotations, is me judice, no book,—it is a plaything. – Thomas Love Peacock, Crotchet Castle, 1831 (The Rev. Dr. Folliott)

Then your words of abuse today may turn into a universally valid principle of denigration, for words are magical formulae. They leave fingermarks behind on the brain, which in the twinkling of an eye becomes the footprints of history. One ought to watch one’s every word. – Franz Kafka, quoted by Gustav Janouch, Conversations with Kafka

There is hardly a mistake which in the course of our lives we have committed, but some proverb, had we known and attended to its lesson, might have saved us from it. – Richard Chenevix Trench, Proverbs and Their Lessons, 1905