You don’t have to wear off or burn off your old bad kamma before you can enjoy the good. Simply make the best use of both pleasure and pain when they come along.

"Some people feel they don’t deserve happiness. Well, the issue of deserving and not deserving happiness never comes up in the Buddha’s teachings. There’s simply the issue of cause and effect. A good action, an action motivated by a skillful intention, leads to good results. It’s impersonal. Unskillful actions motivated by unskillful motivations lead to pain. Each of us has a lot of actions in the past, so there’s bound to be good mixed with bad. You don’t have to wear off the bad kamma before you can enjoy the good. You simply learn to make the best use of both pleasure and pain when they come along.

The Buddha never talks about having to wear off your old kamma before you can gain awakening. The idea that meditation is a purification that burns away your old kamma is actually a Jain teaching that he ridiculed. And you wonder what he would have said about a passage I read the other day in a Buddhist magazine — that if you can maintain equanimity during sex, that can also be a form of purification. The Buddha had no use for these ideas. You don’t have to burn off your old kamma. If you had to burn off your old kamma, he said, we’d never be done. As for the idea of burning off bad kamma by having sex, he would probably have shaken his head in disbelief. But while you’re meditating you can develop a good expansive state of mind — and empathetic joy is one way of developing that expansive state of mind — that helps to mitigate a lot of the results of your own past bad actions.

In other words, there are potentials for suffering coming from your past bad actions but there are also potentials for happiness coming from your past good actions. We all have a mixed bag. Or in the Buddha’s analogy, we each have a field full of seeds of different qualities. There are seeds that will grow bitter fruit, and there are seeds that grow sweet fruit. Just because we have bitter seeds in the field doesn’t mean that we deserve to eat nothing but bitter fruit. It means simply that those sorts of potentials are there. If we keep watering those particular seeds, the fruits are going to come. But we have the choice of which seeds we’re going to water. So you want the water of your mind to be an expansive attitude, one that can water sweet seeds or else sweeten the bitter fruit in such a way that it’s not so bitter."

~ Thanissaro Bhikkhu "Empathetic Joy"