Those people again will not be pleased with the author's remarks, who regard themselves as experts in practical life,--or in what, under the influence of fond habit, has come to be regarded as practical life. They will be of opinion, that whoever wrote this book was not a practical person. These are just the people, who, in the author's opinion, have everything to unlearn and re-learn. Their practice of life seems to him the very thing, which is demonstrated by the actual facts from which mankind are suffering to be an utter mistake,--that very mistake that has led to boundless and immeasurable fatalities. These people will be obliged to recognise the practicability of much that has seemed to them absurd idealism. And although they may condemn this book at the outset, because its opening pages say less about the economic than about the spiritual life of modern mankind, yet the author's own acquaintance with life forces him to the conviction, that, unless people can bring themselves to pay due and accurate attention to the spiritual life of modern mankind, they will only go on adding fresh mistakes to the old ones. Neither will what is said in these pages altogether please those, who are for ever repeating with endless variations the phrases: that man must rise above absorption in purely material interests,--that he must turn to "ideals," to the things of the "spirit." For the author does not attach much importance to mere references to the "spirit" or to talk about a vague spiritual world. The only spirituality he can acknowledge, is that which forms the substance of man's own life and manifests its power no less in mastering the practical problems of life than in constructing a philosophy of life and of the universe, which can satisfy the needs of man's soul. The important point, is not the knowledge,--or supposed knowledge,--of a spiritual life, but that such a spiritual life shews itself in a practical grip of realities, and is not a special preserve for the inner life of the soul, a backwater alongside the full tide of realities. And so, what is said in these pages will seem to the "spiritually-minded" too unspiritual, to "practical persons" too remote from practice. But the author's view is, that he may have his own special use at the present time, for the very reason, that he neither tends towards that aloofness from life, which is to be found in many a man who thinks himself practical, nor yet can hold in any way with the kind of talk about the spirit, which conjures up a mirage out of words.