Lama Ole’s answer:
To have no patience means to get angry. And getting angry burns all the different good karmas. The many positive impressions in one’s mind burn away and disappear.
There are a lot of beings in the world who think, say, and do good things—beings who build up a lot of positivity. But every time they get to a level where a change—a new dimension of awareness—is required, fear and uncertainty arise. Then the beings start to get angry and fall down. When the old habitual feelings and thoughts spread out again, the beings build up good things once more, fall down again, build up again, and so on.