Yoga is relevant in our age. Far from being mystical and otherworldly, it is a teaching firmly grounded in the physiological realities of science. Our experience of the world depends entirely on the state of our nervous system. This, in turn, is influenced by a host of factors – genes, diet, environment, and lifestyle. If the nervous system is fresh and rested, the body is healthy and the mind is alert. As a result, our thoughts are powerful and clear, our actions, which are manifested thoughts, are successful and rewarding.