To remain attached to the temporal, to the changing is to remain within the world of misery because the temporal will be taken away. You have invested so much in it but one day everything is taken away. Then it is natural to feel miserable. Misery is rooted in attachment to the body and bliss is rooted in non-attachment to the body; hence all the great masters have been teaching methods and means of non-attachment, of getting disidentified with the body, with the mind, with everything surrounds you, and of just remaining a pure witness. That's what we are: pure witnessing, pure awareness.