Anyone who has had actual contact with the making of the inventions that built the radio art knows that these inventions have been the product of experiment and work based on physical reasoning, rather than on the mathematicians' calculations and formulae. Precisely the opposite impression is obtained from many of our present day text books and publications.
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As quoted in Electronics (2005) by P. Arun, p. 310Edwin Howard Armstrong
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Fundamental ideas play the most essential role in forming a physical theory. Books on physics are full of complicated mathematical formulae. But thought and ideas, not formulae, are the beginning of every physical theory. The ideas must later take the mathematical form of a quantitative theory, to make possible the comparison with experiment.
Albert Einstein
Though human ingenuity may make various inventions which, by the help of various machines answering the same end, it will never devise any inventions more beautiful, nor more simple, nor more to the purpose than Nature does; because in her inventions nothing is wanting, and nothing is superfluous, and she needs no counterpoise when she makes limbs proper for motion in the bodies of animals. But she puts into them the soul of the body, which forms them that is the soul of the mother which first constructs in the womb the form of the man and in due time awakens the soul that is to inhabit it.
Leonardo da Vinci
They say that each generation inherits from those that have gone before; if this were so there would be no limit to man's improvements or to his power of reaching perfection. But he is very far from receiving intact that storehouse of knowledge which the centuries have piled up before him; he may perfect some inventions, but in others, he lags behind the originators, and a great many inventions have been lost entirely. What he gains on the one hand, he loses on the other.
Eugene Delacroix
I will prefix the motives which originally gave rise to buildings and the development of inventions in this field, following in the steps of early nature and of those writers who have devoted treatises to the origins of civilization and the investigation of inventions. My exposition will, therefore, follow the instruction which I have received from them.
Vitruvius
Throughout their early stages the movements of civilization—for, properly speaking, there was no one movement—were very slow, were local in space, and were partial in the sense that each developed along but few lines. Of the numberless years that covered these early stages we have no record. They were the years that saw such extraordinary discoveries and inventions as fire, and the wheel, and the bow, and the domestication of animals. So local were these inventions that at the present day there yet linger savage tribes, still fixed in the half-bestial life of an infinitely remote past, who know none of them except fire—and the discovery and use of fire may have marked, not the beginning of civilization, but the beginning of the savagery which separated man from brute.
Theodore Roosevelt
Armstrong, Edwin Howard
Armstrong, John
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