Specialists are people who always repeat the same mistakes. Walter Gropius
Every man gets a narrower and narrower field of knowledge in which he must be an expert in order to compete with other people. The specialist knows more and more about less and less and finally knows everything about nothing. Konrad Lorenz
What a delightful thing is the conversation of specialists! One understands absolutely nothing and it’s charming. Edgar Degas
Thinking about the universe has now been handed over to specialists. The rest of us merely read about it. Mason Cooley
Do not be bullied out of your common sense by the specialist; two to one, he is a pedant. Oliver Wendell Holmes, Sr