Excerpt from Habits, Their Effect Upon Life: The Nervous SystemThe molecules in the brain cells become fixed in shape and arrangements, to con form to the character of thought in the growing child, as his bones or the contour of his muscles form their shapes.Just as it takes definite, conscious, per sistent effort to change the contour of a muscle, so does it take definite persistent effort to change a trend of thought and the resultant arrangement and shape of brain cells - hence one 's nature.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.