Yoga Sutras of Patanjali 2.13

2.13

sati mūle tadvipāko jātyāyurbhogāḥ ||

From this root there grow and ripen the fruits of birth, of the life-span, of all that is tasted in life.

Fully to comment on this, would be to write a treatise on Karma and its practical working in detail, whereby the place and time of the next birth, its content and duration. are determined; and to do this the present commentator is in no wise fitted. But this much is clearly understood: that, through a kind of spiritual gravitation, the incarnating self is drawn to a home and life-circle which will give it scope and discipline; and its need of discipline is clearly conditioned by its character, its standing, its accomplishment.