From "Healing Anger" - Dalai Lamas commentary on the patience chapter of "Guide to the Bodhisattva Way of Life"Shantideva:"Therefore I should totally eradicate
The fuel of this enemy,
For this enemy has no other function
Than that of causing me harm."HH CommentHere the "enemy" is this internal enemy which is our true enemy, the ultimate enemy: hatred. This feeling of hatred not only destroys our immediate calmness and peace of mind, but also throws us into a state of confusion. It throws us into a very complicated situation in which we are constantly confronted with confusion, problems and difficulties.
So what is stated here is that, in fact, hatred, this inner enemy, has no function other than causing us harm. It has no other function than simply destroying us, both in the present and in the future.
This is very different from an ordinary enemy. Although a person whom we regard as an enemy may engage in activities which are harmful to us, at least he or she has other functions: that person has to eat, that person has to sleep. So he or she has many other functions, and therefore cannot devote twenty-four hours a day to this project of destroying us. On the other hand, hatred has no other function, no other purpose, than destroying us. Realizing this fact, one should resolve as a practitioner to never allow an opportunity for this enemy, hatred, to arise.