The problems we encounter in our everyday lives - from the midlife crisis to loneliness and the search for meaning - often seem to be phenomena only of the modern world. But they have been encountered and addressed by wise men and women for countless centuries. We are sitting on a treasure chest of teachings formulated by pioneers of human psychology, spirituality and emotional states. These teachings are more than relevant today. They might just be the most radical, effective and low-cost way of changing our lives positively.