It need hardly be said that the subtlest practitioners of DOUBLETHINK are those who invented DOUBLETHINK and… — George Orwell

It need hardly be said that the subtlest practitioners of DOUBLETHINK are those who invented DOUBLETHINK and know that it is a vast system of mental cheating. In our society, those who have the best knowledge of what is happening are also those who are furthest from seeing the world as it is. In general, the greater the understanding, the greater the delusion; the more intelligent, the less sane.

Source: Wikiquote · CC BY-SA 4.0