Purpose Fulfillment Problems or successes, they all are the results of our own actions. Karma. The philosophy of action is that no one else is the giver of peace or happiness. One's own karma, one's own actions are responsible to come to bring either happiness or success or whatever.
What we have done, the result of that comes to us whenever it comes, either today, tomorrow, hundred years later, hundred lives later, whatever, whatever. And so, it's our own karma. That is why that philosophy in every religion: Killing is sin. Killing is sin in every religion.