According to this inference, the purposiveness and well adaptedness of so many natural arrangements would have to prove merely the contingency of the form, but not of the matter,.e., of substance, in the world; for the latter would further require that it be able to be proved that the things of the world would in themselves be unsuited for such an order and harmony according to universal laws if they were not in their substance the product of a highest wisdom; but entirely different grounds of proof from those provided by the analogy with human art would be required for this.