I remember a Stanford professor (Mark Mancall) asking a roomful of freshmen if we were nervous about the exam the next day. (The course was the wonderfully titled "Structured Liberal Education," SLE for short; the students in it all lived in the same dormitory, and we were all a little bit crazy.)

So he asked us if were nervous about the exam, our first in the course.

"Yes," we cried.

"Good," he said. "That's part of the ritual."