Even in such technical lines as engineering, about 15% of one's financial success is due one's technical knowledge and about 85% is due to skill in human engineering, to personality and the ability to lead people.
Dale CarnegieYou can make more friends in two months by becoming interested in other people than you can in two years by trying to get other people interested in you.
Dale CarnegieYou can't win an argument. You can't because if you lose it, you lose it; and if you win it, you lose it.
Dale Carnegie