Thereshouldbethereforeaninsurmountablebarrierbetweenthosewhooughttogivetheeducation，andthosewhoaretoreceiveit，inordertopreventeverykindofcorruption，eventhoughthemotivebelawful。
Whydofatherssocarefullydeprivethosewhoaretomarrytheirdaughtersoftheircompanyandfamiliarity？
Thehorrorthatarisesagainsttheincestofthebrotherwiththesistershouldproceedfromthesamesource。Thedesireoffathersandmotherstopreservethemoralsoftheirchildrenandfamiliesuntaintedissufficienttoinspiretheiroffspringwithadetestationofeverythingthatcanleadtotheunionofthetwosexes。
Theprohibitionofmarriagebetweencousins—germanhasthesameorigin。
Intheearlyages，thatis，inthetimesofinnocence，intheageswhenluxurywasunknown，itwascustomaryforchildren[34]upontheirmarriagenottoremovefromtheirparents，butsettleinthesamehouse；