Simultaneously with the expansion of his consciousness, the pupil comes to the realisation that everything that lives in time and space is alive because it carries within itself polarity and rhythm. He begins to see the secrets of creation. In that moment when the creative principle leaves the absolute and splits in two, the negative and positive pole, i.e., polarity, is born. Between the two there arises a pulsating connection, rhythm is born, and there begins the manifestation of life.
Selvarajan Yesudian and Elisabeth Haich: Yoga and Health. Unwin, 1953