Since each of these papers is intended to be comprehensible by itself, I am obliged, in each, to state, more or less dogmatically, opin ions which I have discussed and attempted to justify in former writings. Dogma, as such, has no place in philosophy. But the present book is no systematic treatise; and is to be judged, I hope, in the light of its own decidedly practical purpose, and of its accompanying limitations.
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