The purpose of a human life is to bring the irrational beginning of our life to a rational beginning. In order to succeed in this, two things are important: (1) to see all irrational, unwise things in life and direct your attention to them and study them; (2) to understand the possibility of a rational, wise life. The major purpose of all teachers of mankind was the understanding of the irrational and rational beginnings in our life. We should be ready to change our views at any time, and slough off prejudices, and live with an open and receptive mind. A sailor who sets the same sails all the time, without making changes when the wind changes, will never reach his harbor.