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

It is a good thing for an uneducated man to read books of quotations. Bartlett’s Familiar Quotations is an admirable work, and I studied it intently. The quotations when engraved upon the memory give you good thoughts. They also make you anxious to read the authors and look for more. – Winston Churchill, Roving Commission: My Early Life, 1930

As proverbs are meant to be portable, it is essential that they should be packed up in few words… – “Proverbs Secular and Sacred,” The North British Review, February 1858

A fine quotation is a diamond on the finger of a man of wit, and a pebble in the hand of a fool. – Joseph Roux (1834–1905), Meditations of a Parish Priest, 1886, translated