But we must not bring them into a figure of proportion when they have already exchanged (otherwise one extreme will have both excesses), but when they still have their own goods.
(1133b) Beraz, ez da proportzioaren irudiaz baliatu behar gauzak trukatu ondoren (bestela, mutur batek bi gehiegikeriak izango ditu), alderdi bakoitzak oraindik bere ekoizkina duenean baizik.