It is not only essential to a Sign that it should represent, i.e. stand in place of or for, an Object, but, if possible, still more so that it should be capable of Interpretation by or through a mind, into which it implants a germ which, on development, will affect the conduct of the person to whom that mind appertains; and not until this effect, which throughout this volume will be called the Interpretant of the Sign, is brought about will the sign function as the Sign .