In one instance, a woman named Kisa Gotami went to seek the help of the Buddha in restoring her dead child to life. Knowing that He could not reason with her as she was so distressed and overwhelmed with grief, the Buddha told her that she should first obtain a handful of mustard seeds from a person who had never lost a dear one through death. The distracted woman ran from house to house and while everyone was only too willing to give her the mustard seeds, no one could honestly say that he or she had not lost a dear one through death. Slowly, Kisa Gotami came to the realization that death is a natural occurrence to be experienced by any being that is born. Filled with this realization she returned to the Buddha and thanked Him for showing her the truth about death.
Now, the point here is that the Buddha was more concerned with the woman's understanding about the nature of life than giving her temporary relief by restoring her child to life -- the child would have grown old and still have died. With her greater realization Kisa Gotami was able not only to come to terms with the phenomenon of death but also to learn about the cause of sorrow through attachment. She was able to realize that attachment causes sorrow, that when attachment is destroyed, then sorrow is also destroyed.