How simple it is; yet how difficult for man to understand! It is simple to him who observes life keenly; it is difficult to him who is absorbed in himself. Life is nothing but this. Life is not a particular philosophy, not a particular faith, not a particular religion, not a particular code of morals. Life is that dependence upon our surroundings, upon the life of our neighbors, upon the life of the nation, upon the life of the whole world. That is what keen observation and a wide outlook on life teaches man.