Erroneous assumptions can be disastrous.

We know nothing about motivation. All we can do is write books about it.

No single piece of macroeconomic advice given by the experts to their government has ever had the results predicted.

One does not start with facts. One starts with opinions.

The one to distrust is the person who never makes a mistake, never commits a blunder, never fails in what he tries to do. Either he is a phony, or he stays with the safe, the tried and the trivial.

It takes far less energy to move from first-rate performance to excellence than it does to move from incompetence to mediocrity.

Far too much reorganization goes on all the time. Organizitis is like a spastic colon.