Editing Original sin (section)

====Concupiscence====
Adam and Eve, via sexual reproduction, recreated human nature. Their descendants now live in sin, in the form of concupiscence, a term Augustine used in a [[Metaphysics|metaphysical]], not a [[Psychology|psychological]] sense. Thomas Aquinas explained this by pointing out that the ''libido'' ("concupiscence"), which makes the original sin pass from parents to children, is not a ''libido actualis'', i.e. sexual lust, but a ''libido habitualis'', i.e. a wound of the whole of human nature.<ref>[https://www.newadvent.org/summa/2082.htm#article4 ''Summa Theologiae I-II'', Question 82, Article 4.]</ref> Augustine insisted that concupiscence was not "a being" but a "bad quality", the [[privation of good]] or a wound.<ref>[https://ccel.org/ccel/schaff/npnf105/npnf105.xvi.v.xxviii.html ''On Marriage and Concupiscence'', Book , Chapter 28], cf. ''Contra Julianum'', Book 6, Chapters 18-19; Book 2, Chapter 10; ''Contra Secundinum Manichaeum'', Chapter 15.</ref> He admitted that sexual concupiscence (''libido'') might have been present in the perfect human nature in [[paradise]], and that only later it became disobedient to human will as a result of the first couple's disobedience to God's will in the original sin.<ref>[https://catholiclibrary.org/library/view?docId=/Fathers-OR/PL.044.html;chunk.id=00001335 ''Contra Julianum'', Book 4, Chapter 11, Section 57], cf. ''Contra secundam Iuliani responsionem imperfectum opus'', Book 2, Chapters 42, 45; Book 6, Chapter 22.</ref>{{sfn|Schmitt|1983|p=104}} In Augustine's view (termed "realism"), all of humanity was really present in Adam when he sinned, and therefore all have sinned. Original sin, according to Augustine, consists of the guilt of Adam that all humans inherit. Although earlier Christian authors taught the elements of physical death, moral weakness, and a sin propensity within original sin, Augustine was the first to add the concept of inherited guilt (''reatus'') from Adam whereby an infant was eternally damned at birth. Augustine held the traditional view that free will was weakened but not destroyed by original sin until he converted in 412 AD to the Stoic view that humanity had no free will except to sin as a result of his anti-Pelagian view of infant baptism.{{sfn|Wilson|2018|pp=16–18, 157–159, 269–271, 279–285}}