A. involuntarily B. coincidentally C. instinctively D. incidentally
As I began to explain my ideas, he asked me to write the equations on the blackboard so he could see how they developed. Then came the staggering — and altogether endearing — (39) . "Please go slowly. I do not understand things quickly." This was from Einstein! He said it gently, and I laughed. From then on, all (40) of fear were gone.