Knowledge is theory. We should be thankful if action of management is based on theory. Knowledge has temporal spread. Information is not knowledge. The world is drowning in information but is slow in acquisition of knowledge. There is no substitute for knowledge.

You can not achieve an aim unless you have a method.

We must understand variation.

If you do not know how to ask the right question, you discover nothing.

One cannot be successful on visible figures alone ... the most important figures that one needs for management are unknown or unknowable, but successful management must nevertheless take account of them.

Divide responsibility and nobody is responsible.

You should not ask questions without knowledge.