For most of us, karma and negative emotions obscure the ability to see our own intrinsic nature, and the nature of reality. As a result we clutch on to happiness and suffering as real, and in our unskillful and ignorant actions go on sowing the seeds of our next birth. Our actions keep us bound to the continuous cycle of worldly existence, to the endless round of birth and death. So everything is at risk in how we live now at this very moment: How we live now can cost us our entire future.
At every moment in our lives we need compassion, but what more urgent moment could there be than when we are dying? What more wonderful and consoling gift could you give to dying people than the knowledge that they are being prayed for, and that you are taking on their suffering and purifying their negative karma through your practice for them?
At the moment of death, there are two things that count: whatever we have done in our lives, and what state of mind we are in at that very moment. Even if we have accumulated a lot of negative karma, if we are able to make a real change of heart at the moment of death, it can decisively influence our future, and transform our karma, for the moment of death is an exceptionally powerful opportunity to purify karma.