fili doctrinae necesse est, ut animae ex suis corporibus patrantur, et haec combustio fit post mortificationem ideo oportet totum comburi et mortificari, eo quod aqua non rubet, nisi post mortificationem.
It is necessary for the sons of doctrine that souls should pass from their bodies, and this combustion takes place after mortification, therefore the whole must be burned and mortified, because water does not redden until after mortification.
A teacher's son must be born to his body, and this is the burning after his death, so he must burn and die, because the water is not red, except after his death.