“A view of the unseemly actions of drunken men is the most effectual dissuasive from wine.”

Part XVIII
Sunday Up the River (1865)

First Annual Address, to both Houses of Congress (8 January 1790).
Compare: "Qui desiderat pacem præparet bellum" (translated: "Who would desire peace should be prepared for war"), Vegetius, Rei Militari 3, Prolog.; "In pace, ut sapiens, aptarit idonea bello" (translated: "In peace, as a wise man, he should make suitable preparation for war"), Horace, Book ii. satire ii.
1790s

Book XXVIII, sec. 23.
Naturalis Historia

Source: A Treatise On Political Economy (Fourth Edition) (1832), Book II, On Distribution, Chapter XI, Section I, p. 375 (See also: Thomas Malthus)

The Complete Neurotic's Notebook (1981), Unclassified

Though "the Bard" is often reference to William Shakespeare, Fuller here probably uses the term in a generic sense, and in tribute to the poet-philosopher she considered in some ways her mentor, Ralph Waldo Emerson, who may have made such a statement, which she elsewhere quotes as "I have witnessed many a shipwreck, yet still beat noble hearts".
Woman in the Nineteenth Century (1845)
Context: I stand in the sunny noon of life. Objects no longer glitter in the dews of morning, neither are yet softened by the shadows of evening. Every spot is seen, every chasm revealed. Climbing the dusty hill, some fair effigies that once stood for symbols of human destiny have been broken; those I still have with me show defects in this broad light. Yet enough is left, even by experience, to point distinctly to the glories of that destiny; faint, but not to be mistaken streaks of the future day. I can say with the bard,
"Though many have suffered shipwreck, still beat noble hearts."
Always the soul says to us all, Cherish your best hopes as a faith, and abide by them in action. Such shall be the effectual fervent means to their fulfilment.