As the architecture of the soul, the chakras describe the underlying psychic structure of of the yoke of yoga, showing how heaven and earth, mind and body, spirit and matter interpenetrate to span the full spectrum of human possibility. As wheels of energy, chakras are like gears that take us on our journey through life. As chambers in the temple of the body, they are centers for the reception, assimilation, and transmission of life force energy. But why is this ancient system so important today and how is it being updated as a map to guide us through the 21st century?