It is impossible to speak in such a way 

that you cannot be misunderstood.

Those who promise us paradise on earth never produced anything but a hell.

Science may be described as the art of systematic over-simplification.

Science must begin with myths, 

and with the criticism of myths.

There will be well-testable theories, 

hardly testable theories, 

and non-testable theories. 

Those which are non-testable 

are of no interest to empirical scientists. 

They may be described as metaphysical.