"By the correct practice of Kriya fourteen times, Maha Mudra twice, and Yoti Mudra twice, twelve years of evolution of body, mind and soul will be gained in a few minutes. Yoga is the super-method by which the evolution of body, mind, and soul can be quickened. That is how the attainment of wisdom and realization, which usually takes a million years and numerous incarnations of natural evolution, is possible in one lifetime." - Swami Yogananda, Kriya Yoga.