People like to be (or at least appear to be) consistent in their thoughts, feelings, and actions. Once they have made a stand, they tend to stick to it and behave in ways that justify their earlier decisions,even if they are erroneous. If you make a commitment to a cause or product, however small, it then becomes easier to be con- vinced to increase it.This is especially true if the commitment changes your view of yourself in a favorable way.This is why salespersons attempt to get customers to agree with them multiple times.After saying “yes” so often, it is almost impossible to say “no” when it comes time for the close or direct request for the sale.