Many of us seem to be willing to consider the concept of karma, and how it might apply to our own lives, but we're far less willing to consider that the concept of reincarnation might have the same applicability. But the two... karma and reincarnation... seem to go together.
The Karmic Law says something like this: What goes around comes around.
The same thing is expressed in classical mechanics, in Newton's Third Law of Motion: For every action there's an equal and opposite reaction.
The Scriptural equivalent might be the verse from Galatians 6:7. It's translated in many different ways, but here is the King James Version as well as the American Standard Version:
Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap.
The verse seems to be saying that we'll reap whatever we sow; if we sow kindness and mercy that's what will return to us.
But suppose a person believes he can commit some evil act at the end of his life and not be subject to the Laws of Karma, not be liable to suffer the karmic consequences in the physical world because he's died. Maybe that's covered in the first part of the verse... the part that says:
Be not deceived; God is not mocked
This part of the verse seems to be saying:
Don't kid yourself, you cannot thumb your nose at God. You cannot escape your karma. If you don't balance your karma in this incarnation, you'll have another incarnation to do it. And another one after that... for as long as it takes.