We all know of Thomas Edison, but most are not aware of Nikola Tesla. Here’s a short video about who he was.
Genius is one percent inspiration and ninety-nine percent perspiration. Thomas Edison
If Edison had a needle to find in a haystack, he would proceed at once with the diligence of the bee to examine straw after straw until he found the object of his search. I was a sorry witness of such doings, knowing that a little theory and calculation would have saved him ninety per cent of his labor. Nikola Tesla, assistant to Thomas Edison