# Teaching

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.

—Gian-Carlo Rota