The ancients, who in these matters were not perhaps such blockheads as some may conceive, considered poetical quotation as one of the requisite ornaments of oratory. – Isaac D’Israeli, “Quotation,” A Second Series of Curiosities of Literature

The apothegm is the most portable form of Truth…. It is thus that the proverb answers where the sermon fails, as a well-charged pistol will do more execution than a whole barrel of gunpowder idly expended in the air. – William Gilmore Simms, Egeria: Or, Voices of Thought and Counsel for the Woods a

To such as these we offer, with some confidence, and with no little sympathy, our collection of choice flowers, culled from the gardens of Poesy: may they refresh the mind, and gladden the heart, and beautify the path, of many a careworn toiler in the fields of labour, of whatsoever kind. – H.G. Adams, A Cyclopædia of Poetical Quotations; Consisting of Choice Passa

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