"Now intelligence seemed quantifiable. You could measure someone's actual or potential height, and now, it seemed, you could also measure someone's actual or potential intelligence. We had one dimension of mental ability along which we could array everyone... The whole concept has to be challenged; in fact, it has to be replaced."

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Einstein uses his concept of God more often than a Catholic priest. Once I asked him: 'Tomorrow is Sunday. Do you want me to come to you, so we can work?' 'Why not?' 'Because I thought perhaps you would like to rest on Sunday.' Einstein settled the question by saying with a loud laugh: 'God does not rest on Sunday either.'

— Leopold Infeld