Why Confidence Matters : Confidence influences the manner in which we talk, behave, and develop. As soon as you feel confident about yourself, you will be able to remain cool even at times of pressure, get closer to the rest of the people, and feel satisfied with your development. Lack of confidence results in inferiority, fear, and apprehension. It is necessary to get acquainted with techniques on how to dispose of stress and anxiety, and begin to develop trust in yourself now.