The paper starts out with a discussion of the difference between mythology and feasible concepts in robotics. Based on a novel brain model and an appropriate formalism, a distinction is made between auto-reflection and hetero-reflection of the robot and self-reflection of its constructor. Whereas conscious robots are able to auto-reflect their mechanical behavior and hetero-reflect the behavior with regard to the environment, the capability of self-reflection must remain within the constructor of the robot. This limitation of the construction of conscious (...) robots is mainly brain-theoretically and philosophically founded. Finally, it is proposed that in addition to a second nature, human technology may succeed in creating a third nature embodied as a society of robots. (shrink)