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

All progress has resulted from people who took unpopular positions. – Adlai Stevenson, speech, Princeton, 1954

Consistency requires you to be as ignorant today as you were a year ago. – Bernard Berenson, Notebook, 1892

The number of those who undergo the fatigue of judging for themselves is very small indeed. – Richard Brinsley Sheridan, The Critic, 1799