The importance of cultivating calmness is well known in India. The Brahmin youth at puberty when initiated into his caste status and given the sacred thread is taught to make the first sought-for attribute calmness. Why is this? Because it helps a man to achieve self-control and because without it he becomes filled with tensions. These tensions come from the ego and prevent him from responding to intuitive feelings and intuitive ideas. For the student of philosophy it is of course absolutely essential to achieve a composed and relaxed inner habit.
-- Perspectives > Chapter 24: The Peace within You > # 3