There was a man in Baghdad who sent his servant to the market to buy provisions.
And in a little while the servant came back, white and trembling, and said, "Master, just now when I was in the market place, I was jostled by a woman in the crowd. And when I turned, I saw it was death that jostled me. She looked at me and made a threatening gesture; now lend me your horse and I’ll ride away from this city and avoid my fate. I’ll go to Samara and there death will not find me.”
The merchant lent him a horse and servant mounted it and he dug his spurs in its flanks and as fast as the horse could gallop, he went. Then the merchant went down to the market place and he saw me standing in the crowd. He came near me and said, "Why did you make a threatening gesture to my servant, when you saw him this morning?”
“That was not a threatening gesture, "I said, it was only a start of surprise. I was astonished to see him in Baghdad, for I had an appointment with him tonight in Samara.”
The nature of death makes life precious. When something becomes more precious, it then cause us to feel the depth of loss that we are going through when we realize that we will never ever experience these precious moments the day we die. Thus, we become more fearful and sad. Hence, the logic of death and life has some element of vicious cycle which makes it hard to totally not feel sad all the time in our lives.
It is not the end of the physical body that should worry us. Rather, our concern must be to live while we're alive.