Yogis split their lives into four sections. They believe that the first twenty-five years are for education; the second twenty-five years are for being a house-holder and for raising a family; the third twenty-five years are for teaching; then the last twenty-five years are when you become a hermit. This last period of time is for your own spiritual development.
Yoga is often described as a journey of Self discovery. You see this journey explained and illuminated when you study Patanjali’s Eight Limbs. (Please refer to previous posts.)