Well, Plato's very next argument attempts to persuade us that indeed we do have reason to believe that the soul is one of the prior-existing pieces.

柏拉图下面一个论证就试着,说服我们有理由相信,灵魂原来就是存在的

耶鲁公开课 - 死亡课程节选

We don't have any particular reason to think my heart's one of the prior-existing pieces; we don't have any good reason to assume that my soul's one of the prior-existing pieces.

我们没有什么理由,去相信我的心脏是之前就存在的,我们没有理由说,我的灵魂之前就是存在的

耶鲁公开课 - 死亡课程节选