Courtesy of papertygre‘s quotefile:

“The brain is not an organ of thinking but an organ of survival, like claws and fangs. It is made in such a way as to make us accept as truth that which is only advantage. It is an exceptional, almost pathological constitution one has, if one follows thoughts logically through, regardless of consequences. Such people make martyrs, apostles, or scientists, and mostly end on the stake, or in a chair, electric or academic.”

—Albert Szent-Gyorgi

Oh. My. God.
That. Is. The. Most. Brilliant. Observation. Ever.