Werner Karl Heisenberg (5 December 1901 – 1 February 1976) was a German theoretical physicist and one of the key creators of quantum mechanics.
What we observe is not nature itself, but nature exposed to our method of questioning. Use this quote
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. Use this quote