“The emotional qualities are antagonistic to clear reasoning.”
Source: The Sign of Four
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Arthur Conan Doyle 166
Scottish physician and author 1859–1930Related quotes

"Unitarian Christianity", an address to The First Independent Church of Baltimore (5 May 1819)

“The spiritual and emotional aspects of art are perhaps their most important qualities.”
The World in Six Songs (2008)

“Emotions are a cancer in one's path to the road of prosperity in life, Emotions Defeat Reason.”
Quoted from his first book https://en.wikipedia.org/wiki/Success_and_Failure_Based_on_Reason_and_Reality, "Success and Failure Based on Reason and Reality" https://www.amazon.co.uk/SUCCESS-FAILURE-BASED-REASON-REALITY/dp/9970983903/ on Amazon, (July 2018)

“Emotion has taught mankind to reason.”
As quoted in Queers in History : The Comprehensive Encyclopedia of Historical Gays (2009), by Keith Stern, p. 466.

“His reasoning was emotional, and therefore simple.”
Source: Time Tunnel (1964), Chapter 8 (p. 102).

“You can never substitute emotion for reason.”
Source: Henry L. Trewhitt (1971) McNamara, p. 119
Context: You can never substitute emotion for reason. I still would allow a place for intuition in this process, but not emotion. They say I am a power gabber. But knowledge is power, and I am giving them knowledge, so they will have more power. Can't they see that?