Stop and think a bit, and you will realize it does make a difference what you believe about life, how it comes to be, where it is going, and what is your place in it. Is there a heaven with a God, who watches you day and night, and knows every thought you think, and will some day take you to eternal bliss if you obey his laws? If you really believe that, you will try to find out about his laws, and you will be comparatively little concerned about the success or failure of your business. Perhaps, on the other hand, you have knocked about in the world and lost your "faith"; you have been cheated and exploited, and have set out to "get yours," as the phrase is; to "feather your own nest." But some gust of passion seizes you, and you waste your substance, you wreck your life; then you wonder, "Who set that trap and baited it? Am I a creature of blind instincts, jealousies and greeds and hates beyond my own control entirely? Am I a poor, feeble insect, blown about in a storm and smashed? Or do I make the storm, and can I in any part control it?" No matter how busy you may be, no matter how tired you may be, it will pay you to get such things straight: to know a little of what the wise men of the past have thought about them, and more especially what science with its new tools of knowledge may have discovered. The writer of this book spent nine years of his life in colleges and universities; also he was brought up in a church. So he knows the orthodox teachings, he can say that he has given to the recognized wise men of the world every opportunity to tell him what they know. Then, being dissatisfied, he went to the unrecognized teachers, the enthusiasts and the "cranks" of a hundred schools. Finally, he thought for himself; he was even willing to try experiments upon himself. As a result, he has not found what he claims is ultimate or final truth; but he has what he might describe as a rough working draft, a practical outline, good for everyday purposes. He is going to have confidence enough in you, the reader, to give you the hardest part first; that is, to begin with the great fundamental questions. What is life, and how does it come to be? What does it mean, and what have we to do with it? Are we its masters or its slaves? What does it owe us, and what do we owe to it? Why is it so hard, and do we have to stand its hardness? And can we really know about all these matters, or will we be only guessing? Can we trust ourselves to think about them, or shall we be safer if we believe what we are told? Shall we be punished if we think wrong, and how shall we be punished? Shall we be rewarded if we think right, and will the pay be worth the trouble?