"Perfect as the wing of a bird may be, it will never enable the bird to fly if unsupported by the air. Facts are the air of science. Without them a man of science can never rise.“

-Ivan Pavlov

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"It goes without saying that the desire to accomplish the task with more confidence, to avoid wasting time and labour, and to spare our experimental animals as much as possible, made us strictly observe all the precautions taken by surgeons in respect to their patients."

-Ivan Pavlov

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"But man has still another powerful resource: natural science with its strictly objective methods."

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"Appetite, craving for food, is a constant and powerful stimulator of the gastric glands."

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"It has long been known for sure that the sight of tasty food makes a hungry man's mouth water also lack of appetite has always been regarded as an undesirable phenomenon, from which one might conclude that appetite is essentially linked with the process of digestion."

-Ivan Pavlov

"From the described experiment it is clear that the mere act of eating, the food even not reaching the stomach, determines the stimulation of the gastric glands."

-Ivan Pavlov

"Edible substances evoke the secretion of thick, concentrated saliva. Why? The answer, obviously, is that this enables the mass of food to pass smoothly through the tube leading from the mouth into the stomach."

-Ivan Pavlov

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"Almost everything that distinguishes the modern world from earlier centuries is attributable to science, which achieved its most spectacular triumphs in the seventeenth century."

-Bertrand Russell

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"Every science begins as philosophy and ends as art."

-Will Durant

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"The most beautiful thing we can experience is the mysterious. It is the source of all true art and science."

-Albert Einstein

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"False facts are highly injurious to the progress of science, for they often endure long but false views, if supported by some evidence, do little harm, for every one takes a salutary pleasure in proving their falseness."

-Charles Darwin

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"Man masters nature not by force but by understanding. This is why science has succeeded where magic failed: because it has looked for no spell to cast over nature."

-Jacob Bronowski

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"Reason, observation, and experience the holy trinity of science."

-Robert Green Ingersoll

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