New ideas are rather like small creatures. They’re easily strangled. - John Cleese

An idea is not responsible for the people who hold it.

It seemed as though he had a fundamental belief that the merit of his argument depended on the strength of his feelings about the matter, and since he always felt uncontrollably passionate about everything, then clearly he was always right.

The really good idea is always traceable back quite a long way, often to a not very good idea which sparked off another idea that was only slightly better, which somebody else misunderstood in such a way that they then said something which was really rather interesting.