The atmosphere of Cambridge was most favorable to the cultivation of a spirit of reverence in scientific thought. At that time, just as to-day, Newton’s name was the glory of Trinity College, and the name of Darwin was regarded with the same feeling of reverence at Christ College. Every college at Cambridge had at least one great name which was the glory of that college. These, one may say, were the names of the patron saints of Cambridge; their spirit was present everywhere, and its influence was certainly wonderful. It reminded me of my mother’s words: “May God be praised forever for the blessings which you have enjoyed and will continue to enjoy in your life among the saints of Cambridge.” It may seem strange that a Cambridge student of science should have worried so much about interpreting his pious mother’s words in terms of his expanding scientific knowledge. But that student was once a Serb peasant in whose early childhood the old Serbian ballads were his principal spiritual food. The central figure of these ballads was Prince Marko, the national hero, who at critical moments of his tempestuous life never appealed for aid to any man. When he needed counsel he asked it from his aged mother Yevrosima, and when he needed help in combat he appealed to Vila Raviyoyla, Marko’s adopted sister, the greatest of all the fairies of the clouds. A mother can have a wonderful influence over her boy whose early mental attitude is moulded by impressions of that kind. When she has that influence, then she is her boy’s oracle, and no amount of subsequent scientific training will disturb that relationship.