Live a meaningful life
A sage gets a curse that he will be born as a pig in his next birth. And the next birth to that will be as a man. In order not to live the pig's life for long, he tells his son to kill the pig (in the sage's next birth) immediately after he locates the pig. He also gives the 'id' of the pig (like its color of skin and other features; as he is a sage, he knows all that!). In his next birth he is born as a pig as envisaged. The son is able to identify his father in the pigsty. He prepares to kill his father, as advised (pig). But the pig stops the son and says that he wants to live the full pig's life and he does not want to die soon. Even if it is a pig, it wants to live as long as possible and not die sooner..... The same holds good for humans too. No one wants to die even at the very old age. Unless the government enacts a law, whereby all citizens above a certain age (let us say, 80 years, since I am 70 years now...!) will be killed, nobody will be ready to die...