There was once an old yogi standing by the side of the river Ganges. He was very hairy and had received a boon that he would only die when each and every hair on his body had fallen out. One hair would fall out each day of Brahma, and each day of Brahma lasts for over four billion years.
One day his disciples offered to build him a shelter to protect him from the elements. “What is the use?” he replied, “Such happiness and this very body are temporary”.