In ethics when discussing behavior and morality, an individual is said to possess the virtue of integrity if the individual's actions are based upon an internally consistent framework of principles. These principles should uniformly adhere to sound logical axioms or postulates. One can describe a person as having ethical integrity to the extent that the individual's actions, beliefs, methods, measures and principles all derive from a single core group of values. An individual must therefore be flexible and willing to adjust these values to maintain consistency when these values are challenged—such as when an expected test result is not congruent with all observed outcomes. Because such flexibility is a form of accountability, it is regarded as a moral responsibility as well as a virtue.
An individual's value system provides a framework within which the individual acts in ways which are consistent and expected. Integrity can be seen as the state or condition of having such a framework, and acting congruently within the given framework.
One essential aspect of a consistent framework is its avoidance of any unwarranted (arbitrary) exceptions for a particular person or group—especially the person or group that holds the framework. In law, this principle of universal application requires that even those in positions of official power be subject to the same laws as pertain to their fellow citizens. In personal ethics, this principle requires that one should not act according to any rule that one would not wish to see universally followed. For example, one should not steal unless one would want to live in a world in which everyone was a thief. The philosopher Immanuel Kant formally described the principle of universal application in his categorical imperative.
The concept of integrity implies a wholeness, a comprehensive corpus of beliefs, often referred to as a worldview. This concept of wholeness emphasizes honesty and authenticity, requiring that one act at all times in accordance with the individual's chosen worldview.
Ethical integrity is not synonymous with the good, as Zuckert and Zuckert show about Ted Bundy: