The substitution of a new moral code for the old one can never be completely satisfactory, unless the new one is accepted with the whole personality, not only with that top layer which constitutes our conscious thought. To most people this is very difficult if throughout their early years they have been exposed to the old morality. It is therefore impossible to judge a new morality fairly until it has been applied in early education.
Source: Marriage and Morals, 1929, by Bertrand Russel
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