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We are moulded also by the thoughts of others; by what we hear in our social life, what we read in newspapers, magazines, and books, what we hear in the movies, the theatre, and on the radio; even by chance remarks from the conversation of bystanders --and these thoughts bombard us constantly. Some of them that accord with our own inmost thoughts and also open the way to greater visions in our life are helpful. But often there are thoughts that are upsetting, that weaken our self-confidence, and turn us away from our high purposes. It is these outside thoughts that are the trouble makers, and later I shall point out how you can keep free of them.
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Claude M. Bristol (The Magic of Believing)