Ch 18 Yoga of Single-pointed Surrender (Part 5)
The summary is this. Daiva is hidden, a secret. It comes suddenly and unexpectedly, and cannot be grasped by the logic of causality. The word in Saṃskṛta is “ākasmika” — kasmāt means from where — “akasmāt” means that one doesn’t know from where it came. It is not possible to determine the causes and effects of such an occurrence. Since daiva is not directly perceptible, we forget it. The blow of despondency, if it hits us, becomes tolerable if we keep daiva in our minds while performing karma.