"Never think that you already know all. However highly you are appraised, always have the courage to say to yourself-I am ignorant."
"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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Source: Ivan Petrovich Pavlov (1957). “Experimental psychology, and other essays”
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"Don't become a mere recorder of facts, but try to penetrate the mystery of their origin."
"When the dog is repeatedly teased with the sight of objects inducing salivary secretion from a distance, the reaction of the salivary glands grows weaker and weaker and finally drops to zero."
"Science demands from a man all his life. If you had two lives that would not be enough for you. Be passionate in your work and in your searching."
"While you are experimenting, do not remain content with the surface of things."
"Men are apt to be much more influenced by words than by the actual facts of the surrounding reality"