Lecture by Swami Tattwamayananda. In Sadhana, the first step is selfless action, Kriya Yoga. The second part of the Sadhanapada discusses the quadrangle of Dukha, suffering. Suffering comes from constant slavery to changeable sensory experiences. Ultimately, the awakening of Viveka-khyati, discerning wisdom, removes the root of this suffering. The ethical disciplines of Yama and Niyama lead us away from pampering the senses. The sixteenth sutra mentions how we are able to avoid future suffering by the practice of such discipline. Verses: II.15, II.16