The Progress of the Race
ful purpose by restoring our courage and stimulating research in a new direction. It might at the first glance seem wiser, perhaps, instead of advancing these ingenious suppositions, simply to say the profound truth, which is that we do not know. But this truth could only be helpful were it written that we never shall know. In the meanwhile it would induce a state of stagnation within us more pernicious than the most vexatious illusions. We are so constituted that nothing takes us further or leads us higher than the leaps made by our errors. In point of fact we owe the little we have learned to hypotheses that were always hazardous and often absurd, and, as a general rule, less discreet than they are to-day. They were unwise, perhaps, but they kept alive the ardour for research. To the traveller, shivering with cold, who reaches the human Hostelry, it matters little whether he
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