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"Don't become a mere recorder of facts, but try to penetrate the mystery of their origin."
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"The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd."
"The animal is ignorant of the fact that he knows. The man is aware of the fact that he is ignorant."
"Almost any biographer, if he respects facts, can give us much more than another fact to add to our collection. He can give us the creative fact; the fertile fact; the fact that suggests and engenders."
"Whoever wishes to keep a secret must hide the fact that he possesses one."
"Theory helps us to bear our ignorance of facts."
"There are no eternal facts, as there are no absolute truths."
"Necessity is not an established fact, but an interpretation."
Explore more quotes by Ivan Pavlov
"The digestive canal represents a tube passing through the entire organism and communicating with the external world, i.e. as it were the external surface of the body, but turned inwards and thus hidden in the organism."
"It is clear to all that the animal organism is a highly complex system consisting of an almost infinite series of parts connected both with one another and, as a total complex, with the surrounding world, with which it is in a state of equilibrium."
"Only by observing this condition would the results of our work be regarded as fully conclusive and as having elucidated the normal course of the phenomena."
"Our success was mainly due to the fact that we stimulated the nerves of animals that easily stood on their own feet and were not subjected to any painful stimulus either during or immediately before stimulation of their nerves."
"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."
"The physiologist who succeeds in penetrating deeper and deeper into the digestive canal becomes convinced that it consists of a number of chemical laboratories equipped with various mechanical devices."
"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."
"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."
"In the case of the stomach, however, the nerves of the glandular cells were always severed when constructing an artificially isolated pouch and this, naturally, affected the normal work of the stomach."
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