It is a mistake to assume that if everybody does his job, it will be all right. The whole system may be in trouble.

One need not be eminent in any part of profound knowledge in order to understand it and to apply it. The various segments of the system of profound knowledge cannot be separated. They interact with each other. For example knowledge about psychology is incomplete without knowledge of variation.

Now, we learn that a system must have an aim. Without an aim, there is no system.

A rule should suit the purpose.

The system that people work in and the interaction with people may account for 90 or 95 percent of performance.

The average American worker has fifty interruptions a day, of which seventy percent have nothing to do with work.

Profit in business comes from repeat customers