"Never think that you already know all. However highly you are appraised, always have the courage to say to yourself-I am ignorant."
"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."
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More quotes by Ivan Pavlov
"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"