The state of mind plays a vital role in one's health and happiness. Many troubles in life stem from one's untrained and undisciplined mind, causing mental unrest and worry. One remedy is to know life in its farther reaches and better applications and to obtain an untroubled mind through spiritual growth. With an untroubled mind, one can smoothly cope with the life's ups and downs, fears and regrets. This book discusses the importance and the guidance of having an untroubled mind, including mind practice and cultivation by faith, prayer, self-control, rest, lighter touch, and virtues.