I remember the words of the great physicist Albert Einstein: A human being is part of the whole we call the universe, a part limited in time and space. He experiences himself in his thoughts and feelings as something separated from the rest . . . a kind of optical illusion of his consciousness. This illusion is a prison for us, restricting us to our personal desires and to affection for only the few people nearest us. Our task must be to free ourselves from this prison by widening our circle of compassion, to embrace all living beings and all of nature. We