Even we are not so simple as to believe that there will ever be an age in which there will be no drawbacks. But that does not release us from the obligation to fight for the removal of the defects which we have recognized, to overcome the shortcomings and to strive towards the ideal. In any case the hard reality of the facts to be faced will always place only too many limits to our aspirations. But that is precisely why man must strive again and again to serve the ultimate aim and no failures must induce him to renounce his intentions, just as we cannot spurn the sway of justice because mistakes creep into the administration of the law, and just as we cannot despise medical science because, in spite of it, there will always be diseases.