From Stephen L. Carter, Integrity:
The word integrity comes from the same Latin root 
as integer and historically has been understood to carry much the same sense, the sense of wholeness: a person of integrity, like a whole number, is a whole person, a person somehow undivided. The word conveys not so much a single-mindedness as a completeness; not the frenzy of a fanatic who wants to remake all the world in a single mold but the serenity of a person who is confident in the knowledge that he or she is living rightly.
A person of integrity lurks somewhere inside each of us: a person we feel we can trust to do right, to play by the rules, to keep commitments. Perhaps it is because we all sense the capacity for integrity within ourselves that we are able to notice and admire it even in people with whom on many issues, we sharply disagree.
