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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.
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Introduction, Sec. 5

 

Vitruvius

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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

 

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

 

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.

 

Edwin Howard Armstrong

 

One cannot deny that in former times man's life had been one of toil and hardship. It is correct to say, therefore, that modern civilization and the progress of science have greatly improved man's life and have brought comfort and ease in their trail. But civilization can serve man both for good as well as for evil purposes. Experience shows that it has invariably brought great dividends to those who use it for good purposes while it has always brought incalculable harm and damnation to those who use it for evil purposes. To make our wills obedient to good influences and to avoid evil, therefore, is to show the greatest wisdom. In order to follow this aim one must be guided by religion. Progress without religion is just like a life surrounded by unknown perils and can be compared to a body without a soul. All human inventions, from the most primitive tool to the modern atom, can help man greatly in his peaceful endeavours. But if they are put to evil purposes they have the capacity to wipe out the human race from the surface of the earth. It is only when the human mind is guided by religion and morality that man can acquire the necessary vision to put all his ingenuous inventions and contrivances to really useful and beneficial purposes.

 

Haile I Selassie