Such powerful nations as Russia and Germany, who could ever have thought that they would fall down in a moment; nations which took hundreds of years to become strong and to build themselves up? But when their time came their downfall did not take long. If such great powers are subject to falling in a moment and their whole construction can be broken, if that is the nature and character of life, no thoughtful person will deny the fact that there must be some mystery behind it, some secret of which he would like to find the key. At least he would want to know what life is and what is behind it.