Wonderful replies, thanks everyone
Appayya Dikshitar suffered from an unbearable stomach pain. But he did not want to cancel the classes for his students. He was also particular that his teaching should not be compromised because of his pain. So he took some grass and transferred his pain to the grass and taught the students. At the end of the classes, he transferred the pain back to his stomach.
Noticing this, one of his students asked Dikshitar why he did not take a bigger clump of grass and transfer all his pain to it once and for all. Dikshitar replied that his stomach ache was the result of his past actions. He had to pay for all his acts of omission and commission. So it was only proper that he pay for his karma.
Bhishma prayed that he should face in this janma itself the consequences of all his karma in all his previous births, so that when he departed from this world, he would go to God with a clean account. There would be no deficits to be carried over to another birth; there would be no need for another birth. It takes a lot of courage to speak as Bhishma did.
So what we derive from the above Sir?
We pay i repeat we pay for every action, that is every Karma done by us; whether it is good or bad.