"Thomas A. Edison was once reluctantly persuaded by his wife to attend one of the big social functions of the season in New York. At last the inventor managed to escape the crowd of people vying for his attention, and sat alone unnoticed in a corner. Edison kept looking at his watch with a resigned expression on his face. A friend edged near to him unnoticed and heard the inventor mutter to himself with a sigh, "If there were only a dog here!""

Next Quote

That is the trouble with many inventors; they lack patience. They lack the willingness to work a thing out slowly and clearly and sharply in their mind, so that they can actually "feel it work." They want to try their first idea right off; and the result is they use up lots of money and lots of good material, only to find eventually that they are working in the wrong direction. We all make mistakes, and it is better to make them before we begin.

— Nikola Tesla