" You know, when Nelson Mandela went to jail he was young and, you could almost say, bloodthirsty. He was head of the armed wing of the African National Congress, his party. He spent twenty-seven years in jail, and many would say, Twenty-seven years, oh, what a waste. And I think people are surprised when I say no, the twenty-seven years were necessary. They were necessary to remove the dross. The suffering in prison helped him to become more magnanimous, willing to listen to the other side. To discover that the people he regarded as his enemy, they too were human beings who had fears and expectations. And they had been molded by their society. And so without the twenty-seven years I don’t think we would have seen the Nelson Mandela with the compassion, the magnanimity, the capacity to put himself in the shoes of the other. "
― Dalai Lama XIV , The Book of Joy: Lasting Happiness in a Changing World