Nothing is harder to topple than a fact that supports a deeply held prejudice denied by its holder.

To manage a system effectively, you might focus on the interactions of the parts rather than their behavior taken separately.

No problem stays solved in a dynamic environment.

Successful problem solving requires finding the right solution to the right problem. We fail more often because we solve the wrong problem than because we get the wrong solution to the right problem.

Art inspires, produces an unwillingness to settle for what we have and a desire for something better. It is the product and producer of creative activity, change; it is essential for continuous development.

So much time is currently spent in worrying about the future that the present is allowed to go to hell.

Unless people can express themselves well in ordinary English, they don't know what they are talking about.