Integrity is defined as the practise of being truthful and adhering to strong moral and ethical beliefs and values in a constant and unwavering manner. Integrity is defined as the honesty, veracity, or correctness of one's conduct in ethics. Integrity gives you a sense of security and assurance about who you are as a person. There is nothing that can boost your self-esteem if you don't have integrity because you aren't honest about your ideals and values. Being secure in who you are and reflecting it to others is what gives you confidence.