Authors:

The rule of the game was never assume that anybody, however honorable, would be able to stand up under torture. If Mr. X, who knew where I was, was caught for some reason, I should move.

"To Save a Life: Stories of Holocaust Rescue" edited by Ellen Land-Weber, Part I, Holland, Ch. 1, (p. 48), 2000.
The rule of the game was never assume that anybody, however honorable, would be able to stand up under torture. If Mr. X, who knew where I was, was caught for some reason, I should move.