Khenpo Karthar Rinpoche
The solution to our problem is basically quite simple. Since the problem begins with the mind, we must go where the problem is, and work with the mind. As was mentioned earlier, although our minds have become weakened by conflicting emotions and habitual tendencies, we do have the potential to become completely self-liberated of these conditionings and to express our inherent freshness in the true, unconditioned heart of compassion and loving-kindness.
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For instance, when we experience a very gentle, easy mind, we then allow ourselves to feel good about who we are, and the things that we do become enjoyable. We are able to enjoy the food we eat, and our interactions with others are very good. On the other hand, when we have a disturbed mind, a mind of aggression and jealousy, subject to the upheaval of conflicting emotions, we are not able to fully enjoy anything. Even if we are surrounded by the best of things--good companions, good food, and various other luxuries--we cannot enjoy them...
As long as we are not free from conflicting emotions such as aggression and jealousy, we are never going to be free from dissatisfactions of one kind or another.
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At present, our experience of the mind has the shortcomings and defects of habitual conditionings. At the same time, our mind has the potential to become completely free of defects and limitations. The difference between the defects and the potential is great; the defects are entirely extraneous to the mind, while the potential is inherent. Therefore, no matter how serious our present limitations may be, we can work with our minds and achieve a state completely free of such limitations.
To put it another way, as long as we are experiencing a defect like jealousy or envy, we cannot experience loving-kindness. And when we are experiencing loving-kindness, we cannot experience jealousy or envy. The two cannot happen at the same time.
To be jealous is to desire someone else's well-being and success for yourself. To experience loving-kindness, on the other hand, is to be happy for others and rejoice when you witness their well-being and success, whether it be of a material or a spiritual nature. Jealousy runs completely counter to this disposition.
In a similar fashion, when you experience genuine compassion, you cannot simultaneously experience hatred, anger, or aggression. As long as there is the one, it will displace the other.