Karika 15

bhēdānāṁ parimāṇāt samanvayācchaktitaḥ pravr̥ttēśca। kāraṇakāryavibhāgādavibhāgādvaiśvarūpasya ॥15॥

The differences arise due to integration of the resulting effects, as per their respective strengths, driven by tendencies, its cause, and acts, by dividing the undivided universal form.