"What matter itself is we know not, but its properties and powers are essentially opposite, "toto genere," to those of mind. From the Infinite Mind matter in its nature must stand yet more perfectly distinct. It has even been argued that, since the effect cannot possess qualities which are not in the cause, and since the effect, in this instance, is material, the cause must be material also; or if the Infinite One be purely spiritual, then matter can be no creation but must have existed eternally. ...But it is not necessary that the effect should be of the same nature with the cause."