Chance. It weaves through our lives like a golden thread, sometimes knotting, tangling, and breaking along the way. Loose threads are left hanging, but the in and out, the back and forth continues, the weaving goes on. It doesn't stop.
The multiplicity is only apparent. This is the doctrine of the Upanishads. And not of the Upanishads only. The mystical experience of the union with God regularly leads to this view, unless strong prejudices stand in the West.