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
Tags: Bird, Fly, Perfect, Ivan Pavlov, Russian, Psychologist
Mini who’s who:
Ivan Pavlov : Russian Psychologist
Born: September 14, 1849
Died: February 27, 1936