Because ideas have to be original only with regard to their adaptation to the problem at hand, I am always extremely interested in how others have used used them.
Thomas A. EdisonTo do much clear thinking a person must arrange for regular periods of solitude when they can concentrate and indulge the imagination without distraction.
Thomas A. EdisonNearly every man who develops an idea works it up to the point where it looks impossible, and then he gets discouraged. That's not the place to become discouraged.
Thomas A. Edison