The public buys its opinions as it buys its meat, or takes in its milk, on the principle that it is cheaper to do this than to keep a cow. So it is, but the milk is more likely to be watered. – Samuel Butler, Notebooks, 1912

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

The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man. – G.B. Shaw, Man and Superman, 1903