Original sentence: His work shows many signs of haste, but he more than compensates for this by the way in which he thus preserves a singularly interesting memorial of the 2nd century: only about one-tenth of The True Word is really lost, and about three-quarters of what we have is verbatim text, quoted by Origen.Sometimes quoting, sometimes paraphrasing, sometimes merely referring, Origen reproduces and replies to all Celsus' arguments
Edited sentence: His work shows many signs of haste, but he more than compensates for this by the way in which he thus preserves a singularly interesting memorial of the 2nd century.Sometimes quoting, sometimes paraphrasing, sometimes merely referring, Origen reproduces and replies to  Celsus' arguments.The ones Origen preserves in his own words