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"We can never obtain peace in the outer world until we make peace with ourselves."
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"Every morning when I wake up, I dedicate myself to helping others to find peace of mind. Then, when I meet people, I think of them as long term friends; I don't regard others as strangers."
[...]"We have a largely materialistic lifestyle characterized by a materialistic culture. However, this only provides us with temporary, sensory satisfaction, whereas long-term satisfaction is based not on the senses but on the mind. That’s where real tranquility is to be found. And peace of mind turns out to be a significant factor in our physical health too."
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"The ultimate source of my mental happiness is my peace of mind. Nothing can destroy this except my own anger."
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"The practice of patience guards us against losing our presence of mind. It enables us to remain undisturbed, even when the situation is really difficult. It gives us a certain amount of inner peace, which allows us some self-control, so that we can choose to respond to situations in an appropriate and compassionate manner, rather than being driven by our disturbing emotions."
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"There needs to be understanding that anger never helps to solve a problem. It destroys our peace of mind and blinds our ability to think clearly. Anger and attachment are emotions that distort our view of reality."
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"Everybody wants a happy life and a peaceful mind, but we have to produce peace of mind through our own practice."Dalai Lama
Source: http://www.azquotes.com/author/8418-Dalai_Lama/tag/peace-of-mind