Quote by Kuhn, Thomas
"When a scientist can no longer take his field for granted, when he has to patch up its dogmas with ad hoc modifications to each in turn, he is in a state of crisis."
More from Kuhn, Thomas
"Discovery commences with the awareness of anomaly."
"The scientist who pauses to examine his own practice will discover equally unsuspected things about the nature of knowledge itself."
"A paradigm is what you think with, not what you think about."
"Truth emerges more readily from error than from confusion."