Although you can find certain differences among the Buddhist philosophical schools about how the universe came into being, the basic common question addressed is how the two fundamental principles-external matter and internal mind or consciousness-although distinct, affect one another. External causes and conditions are responsible for certain of our experiences of happiness and suffering. Yet we find that it is principally our own feelings, our thoughts and our emotions, that really determine whether we are going to suffer or be happy.
Dalai LamaDelusions are states of mind which, when they arise within our mental continuum, leave us disturbed, confused and unhappy. Therefore, those states of mind which delude or afflict us are called 'delusions.'
Dalai LamaIf indeed the qualities such as love, patience, tolerance, and forgiveness are what happiness consists in, and if it is also true that compassion, defined as concern for others, is both the source and the fruit of these qualities, then the more we are compassionate, the more we provide for our own happiness.
Dalai Lama