Never assume the obvious is true. – William Safire, Sleeper Spy

We need — and should encourage and honour — not only discoverers of facts hitherto unknown but explorers of ideas and rethinkers of values. – Walter Moberly, The Crisis in the University

Conservatism should guide; it usually paralyzes. – Martin H. Fischer (1879–1962)

Our wretched species is so made that those who walk on the well-trodden path always throw stones at those who are showing a new road. – Voltaire