The subject of the lecture was beyond my competence. After the first five minutes I was completely lost. At the end of the lecture an arcane dialogue took place between the speaker and some members of the audience—Ambrose and Singer if I remember correctly. There followed a period of tense silence. Professor Struik broke the ice. He raised his hand and said, ``Give us something to take home!'' Calabi obliged, and in the next five minutes he explained in beautiful simple terms the gist of his lecture. Everybody filed out with a feeling of satisfaction.