The Ten Commandments should be headed like an examination paper: No more than six to be attempted.

For some reason which I have failed to understand, many people like the system [scientific totalitarianism] when it is Russian but disliked the very same system when it was German. I am compelled to think that this is due to the power of labels; these people like whatever is labelled ‘Left’ without examining whether the label has any justification.

Conventional people are roused to fury by departure from convention, largely because they regard such departure as a criticism of themselves.

The happiness that is genuinely satisfying is accompanied by the fullest exercise of our faculties and the fullest realization of the world in which we live.

Physics is mathematical not because we know so much about the physical world, but because we know so little; it is only its mathematical properties that we can discover.

Truth is for the gods; from our human point of view, it is an ideal, towards which we can approximate, but which we cannot hope to reach.

The demand for certainty is one which is natural to man, but is nevertheless an intellectual vice. If you take your children for a picnic on a doubtful day, they will demand a dogmatic answer as to whether it will be fine or wet, and be disappointed in you when you cannot be sure.