And the difficulty with that approach, even if we break the question, whether not there're souls, the difficulty at the approach was that it seems as though the soul could constantly be changing while the personality who might call stays the same.

这种前提的难点在于，即使我们将问题分解，先不管灵魂是否存在，难点还在于,似乎灵魂可以,不断地改变，而人格,这个重要的方面，却保持不变。

耶鲁公开课 - 死亡课程节选