The stomach is the only part of man which can be fully satisfied. The yearning of man's brain for new knowledge and experience and for more pleasant and comfortable surroundings never can be completely met. It is an appetite which cannot be appeased.
Thomas A. EdisonSomewhere between the ages of eleven and fifteen, the average child begins to suffer from an atrophy, the paralysis of curiosity and the suspension of the power to observe. The trouble, I should judge, to lie with the schools.
Thomas A. EdisonI never once failed at making a light bulb. I just found out 99 ways not to make one.
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