It's not that we need new ideas, but we need to stop having old ideas.

Its not that we need new ideas, but we need to stop having old ideas.

I can't understand why people are frightened of new ideas. I'm frightened of the old ones.

The need to be right all the time is the biggest bar to new ideas.

The difficulty lies not so much in developing new ideas as in escaping from old ones.

Novel ideas are unsettling, innovative concepts about important matters in human affairs is disruptive of the internal harmony that people prefer. There is a tendency even for the most logical and classically educated people steeped in rational scholastic traditions to assume that if any new hypothesis were correct, a scholar would already written it in a book.