Integrity is more than not being deceitful or slipshod. It means doing everything “heartily as unto the Lord” (Col. 3:23). In his book Lyrics, Oscar Hammerstein II points out one reason why, a reason Christians have always known:
A year or so ago, on the cover of the New York Herald Tribune Sunday magazine, I saw a picture of the Statue of Liberty . . . taken from a helicopter and it showed the top of the statues head. I was amazed at the detail there. The sculptor had done a painstaking job with the ladys coiffure, and yet he must have been pretty sure that the only eyes that would ever see this detail would be the uncritical eyes of sea gulls. He could not have dreamt that any man would ever fly over this head. He was artist enough, however, to finish off this part of the statue with as much care as he had devoted to her face and her arms, and the torch and everything that people can see as they sail up the bay.
When you are creating a work of art, or any other kind of work, finish the job off perfectly. You never know when a helicopter, or some other instrument not at the moment invented, may come along and find you out.