reader finds that on any points he has been led once more to reflect, I shall not have failed, so far as I can, to be original. But I should add that my book is not intended for the beginner. Its language in general I hope is not over-technical, but I have sometimes used terms intelligible only to the student. The index supplied is not an index but a mere collection of certain references.
My book does not design to be permanent, and will be satisfied to be negative, so long as that word implies an attitude of active questioning. The chief need of English philosophy is, I think, a sceptical study of first principles, and I do not know of any work which seems to meet this need sufficiently. By scepticism is not meant doubt about or disbelief in some tenet or tenets. I understand by it an attempt to become aware of and to doubt all preconceptions. Such scepticism is the result only of labour and education, but it is a training which cannot with impunity be neglected. And I know no reason why the English mind, if it would but subject itself to this discipline, should not in our day produce a rational system of first principles. If I have helped to forward this result, then, whatever form it may take, my ambition will be satisfied.
The reason why I have so much abstained from historical criticism and direct polemics may be briefly stated. I have written for English readers, and it would not help them much to learn my relation to German writers. Besides, to tell the truth, I do not know precisely that relation myself. And, though I have a high opinion of the metaphysical powers of the English mind, I have not seen any
