Never be discouraged, because every wrong turn attempt, when left behind you, is another step forward taking you closer to your goals.
Thomas A. EdisonOf the 200 light bulbs that didn't work, every failure told me something that I was able to incorporate into the next attempt.
Thomas A. EdisonThe three great essentials to achieve anything worth while are: Hard work, Stick-to-itiveness, and Common sense.
Thomas A. EdisonA reporter called on Edison to interview him about a substitute for lead in the manufacture of storage batteries that the scientist was seeking. Edison informed the man that he had made 20,000 experiments but none had worked. "Aren't you discouraged by all this waste of effort?" the reporter asked. Edison: "Waste! There's nothing wasted. I have discovered 20,000 things that won't work."
Thomas A. Edison