The fact that civilization is becoming more intricate must not mean that we treat men for a longer period as immature. Does it not mean, perhaps, the… - Edwin H. Land

The role of science is to be systematic, to be accurate, to be orderly, but it certainly is not to imply that the aggregated, successful hypotheses of the past have the kind of truth that goes into a number system.

I think we must say this to each department: "Sharpen up the edges of ideas for the students in fields other than your own. They will not have years in which to find out what you meant, years during which they might achieve a sense of rich insight into your domain. But they are intelligent, they are earnest in their own department; they will profit all their lives from one year of brilliant teaching."

I believe it is pretty well established now that neither the intuition of the sales manager nor even the first reaction of the public is a reliable measure of the value of a product to the consumer. Very often the best way to find out whether something is worth making is to make it, distribute it, and then to see, after the product has been around a few years, whether it was worth the trouble.