“Bravery is to defend yourself from another, and the humanity is to defend the other from yourself.”

2010s, Suicide of a Superpower (2011)

Garantissez-moi de mes amis, écrivait Gourville proscrit et fugitif, je saurai me défendre de mes ennemis. ("Defend me from my friends," wrote Gourville, exile and fugitive, "I can defend myself from my enemies.") — Gabriel Sénac de Meilhan, Considérations sur l'esprit et les moeurs (1788): "De L'Amitié." Sénac de Meilhan was quoting Jean Hérault, sieur de Gourville (1625 - 1703).
The remark has often been attributed to Voltaire and to Claude-Louis-Hector de Villars.
Misattributed

Assumption of power and the prospect of a march north
1980s, Interview with Nguyen Khanh (1981)

Source: Dance with a Vampire

Reported in Josiah Hotchkiss Gilbert, Dictionary of Burning Words of Brilliant Writers (1895), p. 108.
Context: There are two ways of defending a castle; one by shutting yourself up in it, and guarding every loop-hole; the other by making it an open centre of operations from which all the surrounding country may be subdued. Is not the last the truest safety? Jesus was never guarding Himself, but always invading the lives of others with His holiness. There never was such an open life as His; and yet the force with which His character and love flowed out upon the world kept back, more strongly than any granite wall of prudent caution could have done, the world from pressing in on Him. His life was like an open stream which keeps the sea from flowing up into it by the eager force with which it flows down into the sea. He was so anxious that the world should be saved that therein was His salvation from the world. He labored so to make the world pure that He never even had to try to be pure Himself.

Source: The Sun Also Rises

Notebook entry (1951), published in Partisan Review: 50th Anniversary Edition, ed. William Philips (1985)

Source: Kronos US v Sulaiman Abu Ghayth Statement https://kronosadvisory.com/Kronos_US_v_Sulaiman_Abu_Ghayth_Statement.1.pdf (1st March 2013)