This document provides an introduction and overview of key concepts from the Yoga Sutras of Patanjali. It discusses how Yoga philosophy shares a dualistic worldview with Sankhya philosophy. It explains that the goal of Yoga, like Sankhya, is liberation (moksha) facilitated by controlling the fluctuations of the mind. The core practice of Yoga is described as Astanga Yoga, which consists of eight limbs. Several sutras from the Yoga Sutras are summarized, including definitions of yoga, the five types of mental fluctuations (vrittis), and how to gain control of the vrittis through regular practice and non-attachment.