Who said "The mind is capable of great deception."?

This quote is attributed to Armstrong.

The mind is capable of great deception. - Armstrong

"The mind is capable of great deception."

Armstrong Philosophy

Character in And Then There Were None

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"We are none of us infallible."

"The innocent suffer with the guilty."

"Each of us has something to hide."

"We deserve what comes."

"I've seen the worst humanity has to offer."

"Sometimes I wonder if the world is worth saving."

"Every choice shapes our destiny."

"Order is the foundation of a good life."