Sorrow killeth beauty; sorrow killeth strength; sorrow killeth the understanding; and sorrow bringeth on disease. Grief, instead of helping the acquisition of its object, drieth up the body, and maketh one’s foes glad. Therefore, do not yield to grief. Men repeatedly die and are reborn; repeatedly they wither away and grow; repeatedly they ask others for help, and they themselves are asked for help; repeatedly they lament and are lamented.

In plain words: Sorrow takes away beauty, strength and clear thinking, and brings sickness. Grief does not get back what you lost; it only wears you down and pleases your enemies. So do not give in to grief. People are born and die again and again, help and are helped, and mourn and are mourned.