Yoga is a therapy that aims to unite the mind, soul and body. Most yoga styles are derived from hatha yoga, a type of yoga that focuses on the body and breath and aims to develop control over the body through poses (or asanas). Hatha represents the two sides of life – the yin and the yang, the dark and the light – and aims to bring these two sides into harmony and balance. All styles of yoga balance the body, mind and spirit but how they do so may differ. Some styles focus on the poses, while others may focus on breathwork, alignment or the flow of movement.