A consistent pursuit of classical physics forces a transformation in the very heart of that physics.

It will never be possible by pure reason to arrive at some absolute truth.

The structure underlying the phenomena is not given by material objects like the atoms of Democritus but by the form that determines the material objects. The Ideas are more fundamental than the objects.

Every word or concept, clear as it may seem to be, has only a limited range of applicability.

A consistent pursuit of classical physics forces a transformation in the very heart of that physics.

Can quantum mechanics represent the fact that an electron finds itself approximately in a given place and that it moves approximately with a given velocity, and can we make these approximations so close that they do not cause experimental difficulties?

The very act of observing disturbs the system.