Hans Eysenck

“There is no doubt that genetics plays a major role in intelligence.”

“Psychotherapy is an unvalidated and largely bogus profession.”

“Creativity and intelligence are two different things.”

“What is personality? It is the sum total of the actual or potential behaviour-patterns of the organism, as determined by heredity and environment.”

“Extraverts are more suggestible than introverts.”

“It is a mistake to believe that science consists in proving things. In fact, it proceeds by disproving them.”

“If you want to be a great psychologist, you will have to leave the field of psychology.”

“Scientists, especially when they leave the particular field in which they are specialized, are just as ordinary, pig-headed, and unreasonable as anybody else.”

“A long-lasting legacy is determined by the content of your work, not by the consensus of your contemporaries.”

“My work has always been controversial, but I believe that is the price of progress.”

“I always felt that a scientist owes the world only one thing, and that is the truth as he sees it.”

“Personality is a much more important factor in determining academic achievement than is intelligence.”