Book excerpt: First published in 1926, this book is the most important writing from preacher Ernest Shurtleff Holmes. In it, he strives to introduce man to himself, as he truly is. Man is part of the Infinite Spirit, as is all of the visible and invisible in existence. And sharing in the creative power of the Infinite, man becomes able to make thought manifest, as is the case with illness. Holmes explains how the mind controls illness in the body and how changing one's mental state can be healing. In this volume, Holmes gives readers a complete course in Mental Science, so that they may come to understand the power and potential that exists within. Anyone looking for a new way to understand the world and their place in it will find this an empowering read.