The antidote to hatred in the heart, the source of violence, is tolerance. Tolerance is an important virtue of bodhisattvas [enlightened heroes and heroines] - it enables you to refrain from reacting angrily to the harm inflicted on you by others. You could call this practice "inner disarmament," in that a well-developed tolerance makes you free from the compulsion to counterattack. For the same reason, we also call tolerance the "best armor," since it protects you from being conquered by hatred itself.
Dalai LamaIf you have peace of mind, when you meet with problems and difficulties they wonโt disturb your inner peace. Youโll be able to employ your human intelligence more effectively. But, if your mental state is disturbed, full of emotion, it is very difficult to cope with problems, because the mind that is full of emotion is biased, unable to see reality. So whatever you do will be unrealistic and naturally fail.
Dalai LamaGenuine peace is based on inner peace, because you cannot build peace on the basis of anger
Dalai Lama