In the third watch, both hunger and thirst bark for attention, and food is put into the mouth. That which is eaten becomes dust, but they are still attached to eating. In the fourth watch, they become drowsy. They close their eyes and begin to dream. Rising up again, they engage in conflicts; they set the stage as if they will live for 100 years. If at all times, at each and every moment, they live in the fear of God - O Nanak, the Lord dwells within their minds, and their cleansing bath is true.

Sri Guru Granth Sahib