What is the ache you can't name?It is the gap between who you are and how you are seen. Psychology graduate Joyal K. Chacko defines this as Existential Invisibility, and he proposes it is the root of modern anxiety, longing, and unrest.This book is a structured argument against surrendering to that ache. It introduces Sarx Xiphos, the discipline of forging undisciplined desire into a blade of purpose. It reclaims love as an act of will, not a passive emotion. It examines historical, psychological, and personal battles with being unseen.From Weakness to Weapon is a manual. Its aim is not to make you visible to the world, but to make the world irrelevant to your strength. This is the theory and practice of turning a wound into a tool.