The stranger is an element of the group itself, not unlike the poor and sundry 'inner enemies'—an element whose membership within the group involves both being outside it and confronting it.

We cannot change, we cannot move away from what we are, until we thoroughly accept what we are.

引力解释了行星的运动，但它无法解释是谁让行星运动起来的。

检验统计假设的问题由来已久，其起源已不可考。