As a Buddhist I have learned that what principally upsets our inner peace is what we call disturbing emotions. All those thoughts, emotions, and mental events that reflect a negative or uncompassionate state of mind inevitably undermine our experience of inner peace. All such negative thoughts and emotions as hatred, anger, pride, lust, greed, envy, and so on have the effect of disturbing our inner equilibrium. They also have a taxing effect on our physical health.

Tara Bennett-Goleman, Emotional Alchemy