The number three is not a physical object, perfect roundness is not a physical object, perfect goodness is not a physical object.

数字三不是一个物理实体,正圆不是一个物理实体,真正的善良不是一个物理实体

耶鲁公开课 - 死亡课程节选

The number three is not a physical object.

数字三也不是一个物理实体

耶鲁公开课 - 死亡课程节选