What chemists took from Dalton was not new experimental laws but a new way of practicing chemistry (he himself called it the 'new system of chemical philosophy'), and this proved so rapidly fruitful that only a few of the older chemists in France and Britain were able to resist it.
Thomas KuhnNormal science does not aim at novelties of fact or theory and, when successful, finds none.
Thomas KuhnTo turn Karl [Popper]'s view on its head, it is precisely the abandonment of critical discourse that marks the transition of science. Once a field has made the transition, critical discourse recurs only at moments of crisis when the bases of the field are again in jeopardy. Only when they must choose between competing theories do scientists behave like philosophers.
Thomas KuhnIn science novelty emerges only with difficulty, manifested by resistance, against a background provided by expectation.
Thomas KuhnAlmost always the men who achieve these fundamental inventions of a new paradigm have been either very young or very new to the field whose paradigm they change.
Thomas KuhnNormal science, the activity in which most scientists inevitably spend most all their time, is predicated on the assumption that the scientific community knows what the world is like. Normal science often suppresses fundamental novelties because they are necessarily subversive of its basic commitments.
Thomas Kuhn