"In order to arrive at knowledge of..." - Quote by Leonardo Da Vinci

“The earth is moved from its position by the weight of a tiny bird resting upon it.”

“The Book of the science of Mechanics must precede the Book of useful inventions.”

“average human “looks without seeing, listens without hearing, touches without feeling, eats without tasting, moves without physical awareness, inhales without awareness of odour or fragrance, and talks without thinking.”

“Pure mathematics is, in its way, the poetry of logical ideas. ... [By seeking] logical beauty spiritual formulas are discovered necessary for the deeper penetration into the laws of nature.”

“We know enough to be sure that the scientific achievements of the next fifty years will be far greater, more rapid, and more surprising, than those we have already experienced. ... Wireless telephones and television, following naturally upon the their present path of development, would enable their owner to connect up to any room similarly equipped and hear and take part in the conversation as well as if he put his head in through the window.”

“There is, in fact, no reason to believe that any given natural phenomenon, however marvelous it may seem today, will remain forever inexplicable. Soon or late the laws governing the production of life itself will be discovered in the laboratory, and man may set up business as a creator on his own account. The thing, indeed, is not only conceivable; it is even highly probable.”

“Reading without thinking will confuse you.Thinking without reading will place you in danger.”

“My temptation is quiet. Here at life's end Neither loose imagination Nor the mill of the mind Consuming its rag and bone, Can make the truth known.”

“A lack of the historical sense is the hereditary fault of all philosophers.”