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wise there. We see vividly, as normally we should not, the enormous mischief and casual cruelty of our prejudices. And the destruction of a prejudice, though painful at first, because of its connection with our self-respect, gives an immense relief and a fine pride when it is successfully done. There is a radical enlargement of the range of attention. As the current categories dissolve, a hard, simple version of the world breaks up. The scene turns vivid and full. There follows an emotional incentive to hearty appreciation of scientific method, which otherwise it is not easy to arouse, and is impossible to sustain. Prejudices are so much easier and more interesting. For if you teach the principles of science as if they had always been accepted, their chief virtue as a discipline, which is objectivity, will make them dull. But teach them at first as victories over the superstitions of the mind, and the exhilaration of the chase and of the conquest may carry the pupil over that hard transition from his own self-bound experience to the phase where his curiosity has matured, and his reason has acquired passion.