As I said in my earlier lectures, the time has come for humanity to know certain truths concerning the spiritual background to the physical world. If people are not going to be prepared to accept these truths out of their own good will, they will be forced to learn them from the terrible events that will happen as time goes on.
Source: Rudolf Steiner – GA 177 – Fall of the Spirits of Darkness: Lecture 4: The Elemental Spirits of Birth and Death – Dornach, 6 October 1917
The great Rudolf Steiner Quotes Site 