Introduction: an evolutionary riddle, p. 4
In Gods We Trust: The Evolutionary Landscape of Religion (2002)
“Those who betray an oath of loyalty and commitment are in training to become a master of deceit and deception.”
2016
Related quotes

“Incolore sighed. “The loyalty of the systematically betrayed. Is there anything sadder?””
Source: The Iron Dragon's Daughter (1993), Chapter 21 (p. 378)

Source: The Tales of Alvin Maker, The Crystal City (2003), Chapter 4 “La Tia” (p. 74).

New Statesman and Society (8 February 1991).

Speech in the Berlin Zeughaus http://www.nommeraadio.ee/meedia/pdf/RRS/Adolf%20Hitler%20-%20Collection%20of%20Speeches%20-%201922-1945.pdf (March 10, 1940) p. 699
1940s

“The train of history makes sharp turns and those who are not skilled riders fall off the train.”
As quoted in Dorothy Healey, California Red: A Life in the American Communist Party (1993), p. 81.
Attributions
Variant: "When the train of history makes a sharp turn, said Lenin, the passengers who do not have a good grip on their seats are thrown off." Whittaker Chambers, The Revolt of the Intellectuals, TIME magazine, January 6, 1941.
Source: Titus Groan (1946), Chapter 31 “Reintroducing the Twins” (p. 173)