When we limit our minds to a selfish notion of happiness and well-being, obstacles of all kinds will seem to arise spontaneously in order to thwart our plans or destroy what we have created around ourselves. Consequently, we respond to these obstacles with aggression or with jealousy, feeling that our private enclosure is being threatened or jeopardised. And we know from personal experience that when conflicting emotions are constantly running rampant in our lives, there is no possibility of experiencing or even appreciating any sense of well-being, goodness, or true sanity.

-- Khenpo Karthar Rinpoche