Listen to a lecture that conceptualizes the world in threes. Learn how past, present, and future; tamas, rajas, and sattva; knower, knowing, and that which is known all form sacred triads for organizing and understanding your emplacement within the world. Bhur includes the lower realms of earth and water. Bhuvah includes the lighter elements of fire and air. Sva carries consciousness into the heavenly realms of higher awareness.