In this book, I offer the redeeming science of Patanjali's Kriya yoga. My hope is the readers will contemplate, meditate, and integrate these profound truths and practices into their lives preparing themselves for the inevitable experience of Self and God realization. With the unremitting practice of Kriya yoga, knowing by experience is established. We realize the truth of us. At the core, we are individualized units of pure existence-being; we are essences of the God-element. Our interior sacred stronghold is reinforced by our numinous relationship with the Divine. We stand resolute in truth, unwavering in devotion, and steadfast in spirit through our sustained practice of Patanjali's Kriya yoga.