Every tool carries with it the spirit by which it has been created.

Science no longer is in the position of observer of nature, but rather recognizes itself as part of the interplay between man and nature. The scientific method ... changes and transforms its object: the procedure can no longer keep its distance from the object.

The 'path' comes into existence only when we observe it.

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

Only a few know, how much one must know to know how little one knows.

The existing scientific concepts cover always only a very limited part of reality, and the other part that has not yet been understood is infinite.

The violent reaction on the recent development of modern physics can only be understood when one realises that here the foundations of physics have started moving; and that this motion has caused the feeling that the ground would be cut from science