If you want to live a long and fulfilling life, learn to develop yourself. It is easy to be unhappy, but hard to be happy. The attainment of a joyful life requires work on the self.

A recent theme in a class I held was longevity. Live to over 100. How do you do this? Now in the modern age, this seems to be very, very topical because increasingly, more and more people are living to a ripe old age. So the concept of getting sick…