“I aroused Judith’s contempt by asking what good all this was likely to do to mankind? There is no question that annoys your true scientist more.”
Source: Curtain - Poirot's Last Case (1975), chapter 7
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Agatha Christie 320
English mystery and detective writer 1890–1976Related quotes

As quoted in "Great Minds Start With Questions" in Parents Magazine (September 1993).

Kevin Strom, "All America Must Know the Terror That is Upon Us" http://www.amfirstbooks.com/IntroPages/ToolBarTopics/Articles/Featured_Authors/strom,_kevin/kevin_strom_works/Kevin_Strom_1991-1994/Kevin_A._Strom_19930814-ADV_All_America_Must_Know_the_Terror_That_Is_Upon_Us.html (1993)
Misattributed
Variant: "To learn who rules over you, simply find out who you are not allowed to criticize."

As quoted in "Fox News' Shep Smith to Trump: You owe the American people answers" http://www.msn.com/en-us/news/politics/fox-news-shep-smith-to-trump-you-owe-the-american-people-answers/ar-AAn1RFA?li=BBmkt5R&ocid=spartandhp (February 16, 2017), by Brooke Seipel, The Hill
2010s

1960s, I've Been to the Mountaintop (1968)
Context: I remember when Mrs. King and I were first in Jerusalem. We rented a car and drove from Jerusalem down to Jericho. And as soon as we got on that road, I said to my wife, "I can see why Jesus used this as a setting for his parable." It's a winding, meandering road. It's really conducive for ambushing. You start out in Jerusalem, which is about 1200 miles, or rather 1200 feet above sea level. And by the time you get down to Jericho, fifteen or twenty minutes later, you're about 2200 feet below sea level. That's a dangerous road. In the day of Jesus it came to be known as the "Bloody Pass." And you know, it's possible that the priest and the Levite looked over that man on the ground and wondered if the robbers were still around. Or it's possible that they felt that the man on the ground was merely faking. And he was acting like he had been robbed and hurt, in order to seize them over there, lure them there for quick and easy seizure. And so the first question that the Levite asked was, "If I stop to help this man, what will happen to me?" But then the Good Samaritan came by. And he reversed the question: "If I do not stop to help this man, what will happen to him?".
What's the use of walking with God? p. 216 (19 June 1966)
Jesus Our Destiny
Context: Today, when the Gospel is under attack from all directions, I too must ask the question: What profit do you get from your unbelief? I never get the impression that people have peace of mind or are happier for all their unbelief. No, my friends.