“There are four ways, and only four ways, in which we have contact with the world. We are evaluated and classified by these four contacts: what we do, how we look, what we say, and how we say it.”

American writer and teacher

Dale Carnegie was an American writer and teacher, born in 1888 and died in 1955. He became known for courses in self-improvement, salesmanship, corporate training, public speaking, and interpersonal skills. He was born into poverty on a farm in Missouri and built a career around practical advice for personal and professional life. He is best known for How to Win Friends and Influence People, published in 1936, which became a bestseller and remains widely read. He also wrote How to Stop Worrying and Start Living in 1948, Lincoln the Unknown in 1932, and several other books.