The notes by Carnegie are most certainly still appropriate for 21st centruy men and women. I think in today's business world you have to show that kind of respect and give praise for a job well done. "Don't criticize, condemn, or complain." He is exactly right. There may be times in any job when there is something to be done that you don't want to do, or when there is someone you don't get along with, but down the road you will be happy you didn't show criticism or complain. There may be a time when you might need the help of someone you've had a dispute with or when you need a reference from a company. Also, people these days more than ever need to know they are doing a good job. Sure, no one likes to be told they've done a bad job, but a "thanks" or "great job" go a long way. They let the person know you were observant of what was done and appreciative. Those little remarks help keep the motivation and drive up. And lastly, many parts of any job can get dull and boring, especially if they're repetitive. To keep up the pace, it is imporant to make tasks fun and come at them from a different perspective so that people continue to stay efficient.