“Who are these people, and why do they think their own opinions are the only right ones?”

“People who think of themselves as being entirely self-sufficient are, in fact, selfish. They nearly always proclaim their opinions as the only ones that count, their feelings as the only ones that matter, their ideas as the only ones worth thinking.”

“It is only about things that do not interest one, that one can give a really unbiassed opinion; and this is no doubt the reason why an unbiased opinion is always valueless.”

“there's no use trying to live in other people's opinions. The only thing to do is live in your own.”

“Truth gains more even by the errors of one who, with due study and preparation, thinks for himself, than by the true opinions of those who only hold them because they do not suffer themselves to think…”

“Why should we worry about what others think of us, do we have more confidence in their opinions than we do our own?”