Integrity: The virtue of living by your moral principles.
This virtue emphasizes practicing what you preach. When your principles actually benefit you, being in the habit of practicing them can improve your life. The more consistent you are at practicing them, the easier they get, and the more natural the process.
Integrity has other effects. When you do what you say and act according to an understandable code of ethics, it build trust with others. They know they can rely on you and trust you. This creates the possibility of new opportunities that wouldn't otherwise be available. It allows people to expect positive behavior from you, and so they may be willing to have a closer relationship than they otherwise might.