Excerpt from Unseen Forces and How to Use Them The facts of history demonstrate that the great principle of progress is evolution, and the method of the progress has been from the visible to the invisible, from the exter nal shell to the internal substance, from the periphery to the hub, from the without to the within. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.