In what circumstances does this delusion exert its influence on us? It is during twilight or in the dark that we imagine that we see a snake when there is only a rope there. It is through darkness that the delusion comes and envelops us. The delusion beclouds human's mind and covers clear perception.
In the light of awareness delusion disappears. That which exists will always exist; it will never cease to exist. It remains forever unchanged.
It is only the delusion covering it which comes and goes. The form that this delusion takes in the mind is vikshepa the second powerful sakthi of Maya. Vikshepa is the projection that is super imposed on the unchanging basis. (In this case the projection was pictorially the snake instead of rope, what we noticed in darkness.
Another time it will be something else).