 their saying that it is indispensable for achieving order. if it is said its reason is that if it were larger than it it would be indispensable for achieving the overall order and if it were smaller than it it would not be suitable for the intended order.
قولهم لا غنى عنه في تحصيل النظام فإن قيل سببه أنه لو كان أكبر منه لكان مستغنى عنه في تحصيل النظام الكلي، ولو كان أصغر منه لم يصلح للنظام المقصود.