Causality.

Infinite regress leads to self-realization, i.e., realizing self is one and division there is none. What it means is the following. The body which holds the human mind is an emergent property of that which is eternal in nature. That which is eternal in nature is self not wanting to be by itself. Hence the purpose of self aka life. The purpose of self is companionship, friendship, love.
~ Wald Wassermann