p115 Purify your greatest delusion first. If we purify our greatest delusion first, we will find it easier to abandon other delusions. For example, if we have a tendency towards anger

Purify your greatest delusion first.
If we purify our greatest delusion first, we will find it easier to abandon other delusions. For example, if we have a tendency towards anger, we should concentrate on patience, the opponent to anger, and in this way gradually conquer it. We will not be able to overcome our anger immediately but, with persistent practice, its power will diminish week by week, until eventually it subsides altogether.