What you think of yourself is reflected in the way you treat others. A very effective way to raise your own level of confidence is by acting positively toward the people around you. Rudeness toward others, whether intentional or not, is a sure sign of a lack of confidence. When you have no respect or consideration for others, it's difficult to have much confidence in yourself. Ironically,one of the worst things you can do for yourself is to think only of yourself. The more genuine respect, consideration and courtesy you express toward those around you, the more your own confidence will grow. If someone is rude to you, make every effort to be sincerely pleasant and courteous in return. Just because someone else is allowing rudeness to drain away their own energy, doesn't mean you must do the same. Have the confidence to be courteous, and the confidence to act with genuine respect toward others. Your positive attitude and positive actions will empower you with even more confidence and energy.