What is the source of the quote attributed to Origen, that "the soul has neither beginning nor end"?

Related answer: [Is there any substance to the claim that Origen supported reincarnation?](https://christianity.stackexchange.com/a/41428/21576) The following quote is widely attributed to Origen in books and on the internet (e.g., [here](https://books.google.com/books?id=CJKcCgAAQBAJ&pg=PT164&lpg=PT164) and [here](https://books.google.com/books?id=oYeN2OOH3KYC&pg=PA13)) : > The soul has neither beginning nor end. [They] come into this world strengthened by the victories or weakened by the defeats of their previous lives. It's sometimes attributed to Origen's [*De Principiis*](http://www.newadvent.org/fathers/0412.htm) , but a simple text search of that work does not reveal this quote. From the answer linked above, it's pretty clear that Origen taught at least some doctrine of preexistence of souls, but this quote is often used to say that Origen believed in full-blown reincarnation. Where does this quote come from? Is it actually in the writings of Origen? If not, when/where did it originate? --- **Note:** Some might argue that the quote in this question is a fair summary of Origen's teaching. That's irrelevant. I'm interested in the origin of *the quote itself*, accounting for the possibility of minor differences due to translation into English from the original language. None of the "real" Origen quotes listed in the linked answer are anywhere close enough, in my opinion, to be considered the source of the quote in this question.