“Wealth is the fountain head of passions.”

Source: Don Juan

L'amour est de toutes les passions la plus forte, parce qu'elle attaque à la fois la tête, le cœur et le corps.
Le Dernier Volume Des Œuvres De Voltaire: Contes - Comédie - Pensées - Poésies - Lettres http://books.google.com/books?id=ZDo6AAAAcAAJ&pg=PA192&dq=%22L%27amour+est+de+toutes+les+passions+la+plus+forte,+parce+qu%27elle+attaque+%C3%A0+la+fois+la+t%C3%AAte,+le+c%C5%93ur+et+le+corps.%22&hl=de&sa=X&ei=BGt6VKiLDcK5OPXugcgH&ved=0CFkQ6AEwBw#v=onepage&q=%22L%27amour%20est%20de%20toutes%20les%20passions%20la%20plus%20forte%2C%20parce%20qu%27elle%20attaque%20%C3%A0%20la%20fois%20la%20t%C3%AAte%2C%20le%20c%C5%93ur%20et%20le%20corps.%22&f=false (1862)
Citas

Source: Human relations in the restaurant industry. 1948, p. 49

I, ix, 9-10; translation by A.S. Kline
Tristia (Sorrows)

Source: A Voice from the South by a Black Woman of the South (1892), p. 14

Frequently quoted in online leftist circles. Refers to the split of the First Internationale (between anarchists and socialists). The earliest mention is on page 95 of American radicalism, 1865-1901, essays and documents https://hdl.handle.net/2027/mdp.39015011722785?urlappend=%3Bseq=111 (1946) by Chester McArthur Destler, but as of now the German original could not be found.
In German political parlance, "black" more often referred to Catholic interests than to anarchism; it is possible that if Bismarck did say this, it referred rather to a union between the Catholic Center and the Socialist "reds" against the German nationalist/Protestant "blues."
Disputed

Space.com interview (2000)

Epic poetry, Os Lusíadas (1572), Canto III
Original: (pt) Eis aqui, quase cume da cabeça
De Europa toda, o Reino Lusitano,
Onde a terra se acaba e o mar começa.

Stanza 20, lines 1–3 (tr. William Julius Mickle)

Three Coins in a Fountain (1954)
Song lyrics