Thomas Kuhn

"What seems illogical from one paradigm may be perfectly logical from another."

"The values of a scientific community shape its choice of paradigm."

"History reveals the persistence of some paradigms and the vulnerability of others."

"A new paradigm cannot prove itself, it can only show that it works better."

"Scientists do not see what is there, they see what they expect to see."

"The transition between paradigms is always a matter of some controversy."

"We cannot escape our paradigms, we can only transcend them."

"The success of Copernican astronomy was not its initial accuracy, but its promise."

"Anomalies are the harbingers of paradigm shift."

"Scientific truth is not absolute truth, it is paradigm-relative truth."

"The young scientist must learn both the paradigm and how to live within it."

"Revolutionary periods sometimes last for decades, sometimes for only months."

"A paradigm shift is not a discovery, it is an invention."

"The scientist's world becomes different when his paradigm changes."

"No paradigm ever solves all the puzzles it defines for itself."

"The crisis in physics at the turn of the twentieth century was resolved by Einstein's paradigm shift."

"What appears to be a logical deduction may actually be a paradigm-dependent interpretation."

"Scientists accumulate knowledge like bricks in a wall, but sometimes the entire wall must be rebuilt."

"The choice between paradigms is ultimately a choice about values."

"We cannot step outside our paradigm to judge it objectively."

"A scientist may experience profound alienation when confronted with an anomaly that threatens his paradigm."

"The history of science is not a progression toward truth, but a succession of paradigm shifts."

"Revolutionary science requires courage to question what everyone accepts."

"Normal science is problem-solving within an accepted paradigm."

"The paradigm provides both the puzzles and the rules for solving them."

"What one paradigm sees as nonsense, another may see as obvious truth."

"The scientist who works within a paradigm is secure but constrained."

"Paradigm shifts are accompanied by resistance from the scientific establishment."

"A new paradigm often seems bizarre until it becomes familiar."

"The textbook version of scientific history obscures the actual process of discovery."