If you have a strong ego [and] something good happens to an acquaintance of yours, [it] makes you feel bad. It's called envy. ... The ego thinks something has been taken away from you because somebody else has received something good. It's a complete illusion, but that's the madness of the ego.
Eckhart TolleTerrorism is an example of that extreme madness. People blow themselves up just to kill others. Unconscious reaction to terrorism is equal madness.
Eckhart TolleThe particular egoic patterns that you react to most strongly in others and misperceive as their identity tend to be the same patterns that are also in you, but that you are unable or unwilling to detect within yourself.
Eckhart Tolle