Habit rules the unreflecting herd. – William Wordsworth, Ecclesiastical Sonnets, 1822

We must not overlook the role that extremists play. They are the gadflies that keep society from being too complacent. – Abraham Flexner, Universities, 1930

Orthodoxy: That peculiar condition where the patient can neither eliminate an old idea nor absorb a new one. – Elbert Hubbard, The Note-Book, 1927

When people are free to do as they please, they usually imitate each other. – Eric Hoffer, Passionate State of Mind, 1955