Ananda Yoga is a classical style of hatha yoga that uses asana and pranayama to awaken, experience, and begin to control the subtle energies within oneself, especially the energies of the chakras. Its object is to use those energies to harmonize body, mind, and emotions, and above all to attune oneself with higher levels of awareness. One unique feature of this system is the use of silent affirmations while in the asanas as a means of working more directly and consciously with the subtle energies to achieve this attunement. Ananda Yoga is a relatively gentle, inward experience, not an athletic or aerobic practice. It was developed by Swami Kriyananda, a direct disciple of Paramhansa Yogananda, author of the spiritual classic, Autobiography of a Yogi.