The stumbling way in which even the ablest of the scientists in every generation have had to fight through thickets of erroneous observations, misleading generalizations, inadequate formulation, and unconscious prejudice is rarely appreciated by those who obtain their scientific knowledge from textbooks.

Every vital organization owes its birth and life to an exciting and daring idea.

Science is a dynamic undertaking directed to lowering the degree of the empiricism involved in solving problems; or, if you prefer, science is a process of fabricating a web of interconnected concepts and conceptual schemes arising from experiments and observations and fruitful of further experiments and observations.

Even the development of the steam engine owed but little to the advancement of science.

Science advances, not by the accumulation of new facts, but by the continuous development of new concepts.

... scientific research is compounded of ... empirical procedures, general speculative ideas, and mathematical or abstract reasoning.

Behavior which appears superficially correct but is intrinsically corrupt always irritates those who see below the surface.