I really wonder sometimes if the nuns I have met working in Haiti aren’t actually angels in disguise. The Sisters of Charity are the order of Catholic nuns founded by Mother Teresa of Calcutta. In Port-au-Prince they have two houses, one for the dying and another sick children. Their work with the children inlvolves providing medical care and nutritional rehabilitation to children whose parents cannot adequately care for them. Most of the children suffer from severe forms of malnutrition -- kwashiorkor or marasmus. They often also have other diseases like tuberculosis, diarrhea, pneumonia or bloodstream infections. The nuns, often with the help of volunteers, take in these children and care for them. They clean and feed and hold them. They administer medicines, dress wounds and give special nutritional supplements through tubes. Some children die, but most recover over the course of several weeks and are able to return home. What impresses me so much about the sisters is the incredible joy, humility and serenity the posses. The sisters themselves work very hard, live very simply, face immense suffering and poverty and have no personal wealth -- yet they are among the happiest people I have ever met. What is their secret?