Unas ideas del Dalai Lama:
However, as human beings we are gifted with this wonderful human intelligence. Besides that, all human beings have the capacity to be very determined and to direct that strong sense of determination in whatever direction they like. So long as we remember that we have this marvellous gift of human intelligence and a capacity to develop determination and use it in positive ways, we will preserve our underlying mental health. Realizing we have this great human potential gives us a fundamental strength. This recognition can act as a mechanism that enables us to deal with any difficulty, no matter what situation we are facing, without losing hope or sinking into feelings of low self-esteem.
I have learned that what principally upsets our inner peace is what we call disturbing emotions. All those thoughts, emotions, and mental events which reflect a negative or uncompassionate state of mind inevitably undermine our experience of inner peace. All our negative thoughts and emotions - such as hatred, anger, pride, lust, greed, envy, and so on - are considered to be sources of difficulty, to be disturbing. Negative thoughts and emotions are what obstruct our most basic aspiration - to be happy and to avoid suffering. When we act under their influence, we become oblivious to the impact our actions have on others: they are thus the cause of our destructive behaviour both toward others and to ourselves.