"Nature always springs to the surface and manages to show what she is. It is vain to stop or try to drive her back. She breaks through every obstacle, pushes forward, and at last makes for herself a way."

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Individuals who break through by inventing a new paradigm are almost always either very young men or very new to the field whose paradigm they change. These are the men who, being little committed by prior practice to the traditional rules of normal science, are particularly likely to see that those rules no longer define a playable game and conceive another set that can replace them.

— Thomas Kuhn