Can we then say that Lucifer is evil, or can we say that Lucifer is good? One can only say that if a man maintains that Lucifer is evil, and that we must flee from him, then it must also be said that we must avoid fire, because in certain circumstances it destroys life. On the path of initiation we find that the words good and evil cannot be used in this way for the description of any being of the super-sensible world order. Fire is good when it acts in good conditions, evil when it works in evil ones; in itself it is neither the one nor the other. So it is with Lucifer. He exercises a good influence on man’s soul when he becomes the instigator of man’s sacrifice on the altar of human evolution of all that is most individual in his soul. Lucifer becomes an evil being rather, what he does becomes evil — when he arouses impulses leading only to self-gratification in the human soul. Thus, once our attention has been drawn to these beings, we have to follow up the effect their deeds have in the world. The acts of super-sensible beings can be described as good or bad; the beings themselves, never!
Rudolf Steiner, INITIATION, ETERNITY AND THE PASSING MOMENT (Anthroposophic Press, 1980), lecture 6, GA 138.
In which Rudolf Steiner almost makes sense for once