What if you could harness the very force that drives every decision, every habit, every triumph? In this timeless guide, Frank Channing Haddock reveals the nature of will and its power to shape character, health, success, and happiness. First published in 1907, The Power of Will became an instant classic of the New Thought movement—not by promising shortcuts, but by showing you how to cultivate mental energy, overcome indecision, and train your will like a muscle. This modern‑English edition preserves Haddock’s original meaning and spirit in language that flows for today’s readers. No hype, no pseudoscience—just clear, grounded principles for strengthening your resolve and living with purpose. Whether you seek better habits, greater focus, or a deeper sense of personal authority, this book remains as practical and inspiring as it was a century ago. Part of The Modern Wisdom Library.