373. Since the will and understanding are receptacles of love and wisdom, these two are organic forms, or forms organized out of the purest substances, for such they must be to be receptacles. It does not matter that their organization is imperceptible to the eye. Even when the vision of the eye is magnified by the microscope, the organization lies within, imperceptible. The smallest insects also are imperceptible to vision, yet they have organs of sense and motion, for they feel, and walk and fly. Acute observers have discovered from their anatomical studies by means of the microscope, that they, too, have brains, hearts, lung tubes, and viscera. When the tiny insects themselves are not visible and still less their component viscera, and it is not denied that they are organized even to each single particle in them, how then can it be said that the two receptacles of love and wisdom, called will and understanding, are not organic forms? How can love and wisdom, which are life from the Lord, act on what is not a subject, or on anything which has no substantial existence? How otherwise can thought inhere, and how can anything be spoken from non-inherent thought? Is not the brain, where thought presents itself complete and organized in every part thereof? There the organic forms themselves are visible even to the naked eye; and the receptacles of the will and understanding in their first principles emerge in the cortical substance, where they are clearly seen as small glands, concerning which see above (n. 366). Do not, I beg you, think of these things from an idea of vacuum. Vacuum is nothing, and in nothing, nothing takes place, and from nothing, nothing comes forth. (Concerning the idea of vacuum, see above, n. 82).