You're going to find out, you know, one of these years when you start teaching that when you get really close to a blackboard, you just cannot think.

过几年以后,你们渐渐就会发现,当你开始教课,当你离黑板真的很近的时候,你就没法思考了

耶鲁公开课 - 基础物理课程节选

You cannot answer that, even if I promised to move only along the x-axis, because I think...I don't want to pose this as a question, because I think the answer is fairly obvious to everybody.

即使我保证只在 x 轴上移动,你们仍然无法回答,因为我觉得...我不想将其作为一个问题,因为我认为答案是显而易见的

耶鲁公开课 - 基础物理课程节选