Students of 21st Century Transnational Postural Yoga typically begin our study with little or no theory; practice is all. As we deepen our practice, we are introduced to what we are told is “Yoga Philosophy.” Depending on the tradition we are studying, this is usually a pat genealogy; we are told that “Yoga Philosophy” is found in the Yoga Sūtras, and that the philosophy they contain is called स़ाम्ख्य, Sāmkhya, and that it is dualistic.