Famous Quotes / Ivan Pavlov

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Ivan Pavlov: "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's Quotations


Quotations about
BirdEnableFactsPerfect
RiseScienceThemUnsupported
WingWithout
Quotes by Power Quotations