What is the harsh truth of life?

According to me the harsh truth of life is that we are going to die one day or the other.Life is so beautiful,the people,the places,our family,our home everything is a wonderful gift of God given to us.We are living in a beautiful planet “Earth” where we have air to breathe,water to drink,food to eat,clothes to wear & every essential things required to survive.But among all if we think,then yes its a harsh truth that we human beings have a limited life.No one is here for lifetime.