It was also said of Descartes that he entertained the sick with mathematics.
~ Gaby Wood, Edison’s Eve
Oscar Wilde writes in De Profundis that friends have a right to share in each other’s sufferings and when denied that right may pound at the door till admitted. It could only have been violence like this that persuaded Descartes’ friends to let him into their sick rooms. As Job once discovered, there are friends for sickness and friends for health. We hope they know which kind they are.