Another thing is that man is mostly selfish, and what interests him is that which concerns his own life. Not knowing the troubles of the lives of others he feels the burden of his own life even more than the burden of the whole world. If only man in his poverty could think that there are others who are poorer than he, in his illness that there are others whose sufferings are perhaps greater than his, in his troubles that there are others whose difficulties are perhaps greater than his!