People are very open-minded about new things - as long as they're exactly like the old ones.

Great steps in human progress are made by things that don't work the way philosophy thought they should. If things always worked the way they should, you could write the history of the world from now on. But they don't, and it is those deviations from the normal that make human progress.

Problems are the price of progress. Don't bring me anything but trouble. Good news weakens me.

Learn how to fail intelligently.

Inventing is a combination of brains and materials. The more brains you use, the less material you need.

Our imagination is the only limit to what we can hope to have in the future.

Research is an organized method of trying to find out what you are going to do after you cannot do what you are doing now. It may also be said to be the method of keeping a customer reasonably dissatisfied with what he has. That means constant improvement and change so that the customer will be stimulated to desire the new product enough to buy it to replace the one he has.