"Never think that you already know all. However highly you are appraised, always have the courage to say to yourself-I am ignorant."
"But man has still another powerful resource: natural science with its strictly objective methods."
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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."
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"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."
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