Thoughts of renunciation spring from the wholesome root of non-greed, which they activate whenever they are cultivated. Since contrary thoughts cannot coexist, when thoughts of renunciation are roused, they dislodge thoughts of desire, thus causing non-greed to replace greed. Similarly, the intentions of good will and harmlessness offer the antidote to aversion. Aversion comes to manifestation either in thoughts of ill will—as angry, hostile, or resentful thoughts; or in thoughts of harming—as the impulses to cruelty, aggression, and destruction.
~Bhikkhu Bodhi, in The Noble Eightfold Path