Tell a child, a husband or an employee that he is stupid or dumb at a certain thing, that he has no gift for it, and that he is doing it all wrong and you have destroyed almost every incentive to try to improve. But use the opposite technique, be liberal with encouragement; make the thing seem easy to do, let the other person know that you have faith in his ability to do it, that he has an undeveloped flair for it - and he will practice until the dawn comes in at the window in order to excel.
Dale CarnegieNeither you nor I nor Einstein nor the Supreme Court of the United States is brilliant enough to reach an intelligent decision on any problem without first getting the facts
Dale CarnegieThe only way on Earth to influence other people is to talk about what they want and show them how to get it.
Dale CarnegieWhen two partners always agree, one of them is not necessary." If there is some point you haven't thought about, be thankful if it is brought to your attention.
Dale Carnegie