The Secret of the Ages should rightfully be called the original of "The Secret." It is one of the pioneering works on the powers of the Universal Mind and the subconscious mind. The author says about this book:

"The great “Middle Class” has to bear the burdens of both the poor and the rich— and take what is left for itself.

It is to them that I should like to dedicate this book. If I cannot endow libraries or colleges for them, perhaps I can point the way to get all good gifts for them.
For men and women like them do not need “charity” — or even sympathy. What they do need is inspiration—and opportunity—the kind of inspiration that makes a man go out and create his own opportunity. And that, after all, is the greatest good one can do anyone. Few people appreciate free gifts. They are like the man whom admiring townsfolk presented with a watch. He looked it over critically for a minute. Then—”Where’s the chain?” he asked.
But a way to win for themselves the full measure of success they’ve dreamed of but almost stopped hoping for—that is something every young couple would welcome with open arms. And it is something that, if I can do it justice, will make the “Eternal Triangle” as rare as it is today common, for it will enable husband and wife to work together—not merely for domestic happiness, but for business success as well. "