It is true that many scientists are not philosophically minded and have hitherto shown much skill and ingenuity but little wisdom.

It is a fascinating fact that father and son have given the most striking evidence for the apparently contradictory properties of the electron: the father proving its character as a particle, the son its character as a wave... Thomson was extremely proud of his son's success and tried to assimilate the new results into his old convictions.

No language which lends itself to visualizability can describe quantum jumps.

The belief that there is only one truth and that oneself is in possession of it seems to me the deepest root of all evil that is in the world.

There are two objectionable types of believers: those who believe the incredible and those who believe that 'belief' must be discarded and replaced by 'the scientific method.

All attempts to adapt our ethical code to our situation in the technological age have failed.

I believe there is no philosophical high-road in science, with epistemological signposts. No, we are in a jungle and find our way by trial and error, building our road behind us as we proceed.