About Dale Carnegie:
Dale Harbison Carnegie was an American writer and lecturer and the developer of famous courses in self-improvement, salesmanship, corporate training, public speaking, and interpersonal skills. Born into poverty on a farm in Missouri, he was the author of How to Win Friends and Influence People (1936), a massive bestseller that remains popular today. He also wrote How to Stop Worrying and Start Living (1948), Lincoln the Unknown (1932), and several other books.
Happiness doesn't depend on any external conditions, it is governed by our mental attitude.
Dale CarnegieIt never hurts a fool to appear before an audience, for his capacity is not a capacity for feeling.
Dale CarnegieIf you want enemies, excel your friends; but if you want friends, let your friends excel you.
Dale Carnegie