I don’t know off-hand, but I am inspired to read the rest of Mao’s quotations to finish it and find that quote

Any chance it’s:

“Many people think that it is wrong methods that make for strained relations between officers and men and between the army and the people, but I always tell them that it is a question of basic attitude (or basic principle) of having respect for the soldiers and the people. It is from this attitude that the various policies, methods, and forms ensue. If we depart from this attitude, flare (sp?) the polities, methods and forms will certainly be wrong, and the relations between officers and men and between the army and the people are bound to be unsatisfactory. Our three principles for the army’s political work are first, unity between officers and men; second, and third, the disintegration of the enemy forces. To apply these principles effectively, we must start with this basic attitude of respect for the soldiers and the people, and of respect for the human dignity of prisoners of war once they have laid down their arms. Those who take all of this as a technical matter and not one of basic attitude are indeed wrong, and should correct their view.”

On protracted war (May 1938). Selected Works Vol. II pp 186-87

That’s on page 287 on my copy of the little red book. It’s got some printing errors, but I’ve tried to correct what I can parse out.