The forty-eight hours after the march into the Rhineland were the most nerve-racking in my life. If the French had then marched into the Rhineland, we would have had to withdraw with our tails between our legs, for the military resources at our disposal would have been wholly inadequate for even moderate resistance.
As quoted by Paul Schmidt, his interpreter, in "What Hitler Knew: The Battle for Information in Nazi Foreign Policy" by Zachary Shore.
Also in: Rise And Fall Of The Third Reich (Simon & Schuster, 1990), p. 293